WordPress plugins expand your website with additional features without having to program them yourself. With plugins, you can, for example, create contact forms, automate backups, improve security, set up an online store, support search engine optimization, or optimize the performance of your website.
Installing a plugin in WordPress is usually done with just a few clicks. Nevertheless, you shouldn't install every plugin that sounds interesting. Every additional plugin adds program code to your website and can impact security, speed, and compatibility. In this guide, you will therefore not only learn how to install a WordPress plugin, but also how to choose suitable plugins and avoid common mistakes.
Briefly explained: WordPress provides the basic functions of your website. Plugins add additional features to WordPress. Therefore, you only install the extensions that your website actually needs.
What is a WordPress plugin? #
A plugin is a software extension for WordPress. It uses the interfaces provided by WordPress and expands the content management system with additional functions.
WordPress itself already contains everything needed for the basic management of a website. For example, you can create pages and posts, manage images, create users, and control the basic appearance via a theme.
If you need additional features beyond that, plugins come into play. Typical examples are:
- Contact forms,
- Spam protection,
- SEO features,
- Backups,
- Safety features,
- Caching and Performance Optimization,
- Newsletter integrations,
- Multilingualism,
- Cookie and privacy features,
- Online stores with WooCommerce,
- appointment or booking systems,
- and many other extensions.
Plugins can be very small and add only a single function. Other extensions, such as WooCommerce however, significantly modify WordPress and expand the system, for example, by adding a complete e-commerce platform.
Where do you get WordPress plugins? #
The most important source for free plugins is the official WordPress Plugin Directory. You can search and install these plugins directly from your WordPress admin area.
In addition, there are commercial premium plugins that are sold directly by their developers or through specialized providers. Such plugins are often provided as a ZIP file and then uploaded manually via WordPress.
Important: Only download WordPress plugins from trusted sources. Do not use manipulated or illegally offered copies of paid premium plugins. Such so-called „nulled“ plugins may contain modified program code, malware, or hidden access points and pose a significant security risk.
Free plugin or premium plugin? #
A paid plugin is not automatically better than a free one. The official WordPress directory contains numerous established plugins that are completely sufficient for many websites.
Premium plugins often offer additional features, professional support, or advanced integrations. Therefore, whether you need a paid extension depends on your website's requirements.
What matters less is the price than the quality and maintenance of the plugin.
How do I recognize a good WordPress plugin? #
Before installing a plugin, you should check some information. Especially when dealing with multiple extensions with similar functions, a quick comparison is worth it.
Pay attention to the following points, among others:
- Relevance: Will the plugin continue to be maintained and regularly updated?
- Compatibility: Is it compatible with your current WordPress version?
- Installations: Is the plugin already used by a relevant number of websites?
- Reviews: What experiences do other WordPress users report?
- Support Does the developer respond to issues and support requests?
- Documentation: Are there comprehensible guides for the setup?
- Developer: Who is behind the plugin and is it actively being developed further?
A high number of active installations alone is not proof of quality. Conversely, a new or specialized plugin with few installations is not necessarily bad. The overall picture is what matters.
Recommendation: Before installation, check at least the date of the last update, compatibility with your WordPress version, reviews, and support activity.
How many WordPress plugins should you install? #
There is no fixed number at which a WordPress website has „too many“ plugins. Ten poorly coded extensions can be more problematic than 30 well-developed plugins.
Nevertheless, the rule still applies: only install plugins that you actually need. Every additional extension increases the scope of your website and must be updated, monitored, and taken into account if problems arise.
You should avoid having multiple plugins for the same task whenever possible. Two caching plugins, multiple security solutions, or different plugins performing the same optimizations at the same time can interfere with each other.
Install WordPress plugin directly via the dashboard #
The simplest installation method is the integrated WordPress plugin search. With it, you can install plugins directly from the official WordPress Plugin Directory.
- Log in to WordPress admin area a.
- Open in the left navigation „Plugins“.
- Click on „Add plugin“ or rather „Add new plugin“.
- Enter the name or a matching search term into the search field.
- Check if you found the right plugin.
- Click on the desired plugin „Install now“.
- Wait for WordPress to finish the installation.
- Then click on „Activate“.
After activation, the plugin is generally ready for use. Depending on the extension, you may still need to configure it afterwards.
If you don't know how to log in to WordPress, you can find the process in our article. Access the WordPress admin area, which we also cover in this knowledge base.
What is the difference between installing and activating? #
These two terms are frequently confused by WordPress beginners.
If you were a plugin installing, his files are stored on your hosting. However, that does not necessarily mean that his functions are used on the website.
Only through Activate is the installed plugin activated in WordPress.
Installed: The plugin is located on your web hosting.
Activated: WordPress loads the plugin and its functions are used.
Therefore, a plugin can be installed but disabled.
Install premium plugin as ZIP file #
Plugins that you obtain outside of the official WordPress directory are often called ZIP file provided. This is the case, for example, with many commercial premium plugins.
You can also install such plugins directly via the WordPress admin area.
- Download the plugin's installation file from the provider.
- Log in to the WordPress admin area.
- Open „Plugins“ > „Add Plugin“.
- Click above „Upload plugin“.
- Select the ZIP file on your computer.
- Click on „Install now“.
- Wait for WordPress to finish the installation.
- Then click on „Activate plugin“.
Do not extract the ZIP file beforehand: If the provider supplies you with a ready-to-install plugin ZIP file, you normally upload it directly via „Upload Plugin“ in WordPress.
Error „The package could not be installed“ #
With commercial plugins, you sometimes receive a download package from the provider that, in addition to the actual plugin, contains other files such as documentation, license information, or additional extensions.
If WordPress reports during an upload that no valid plugin was found or the package could not be installed, check whether you actually installable plugin ZIP file you have selected.
If necessary, you may first need to extract the originally downloaded master archive on your computer. Inside it, you will find another ZIP file intended for installation via WordPress.
What happens after activation? #
That depends on the respective plugin. Some extensions work immediately after activation. Others require configuration first.
For example, a plugin can:
- add a new menu item in the WordPress dashboard,
- a subitem under „Settings“ create,
- start a setup assistant,
- provide additional blocks for the WordPress editor,
- add new features to existing areas,
- or require a connection to an external service.
Therefore, after installation, you should read the plugin's documentation and only activate the features you actually need.
Update WordPress plugins regularly #
Installing a plugin is not the final step. Plugins are continuously developed by their authors. Updates can fix bugs, add new features, improve compatibility with WordPress, or close security vulnerabilities.
Outdated plugins are among the avoidable security risks of a WordPress website. That is why you should not ignore available updates indefinitely.
Safety: An installed plugin remains part of your WordPress installation even if you don't use it for months. Therefore, keep used plugins up to date and remove extensions that you no longer need permanently.
Should I enable automatic plugin updates? #
WordPress can automatically install updates for individual plugins. Whether this is advisable depends on the website and the respective plugin.
For a simple website, automatic updates for many extensions can be practical. For mission-critical websites, complex installations, or WooCommerce stores, on the other hand, you should carry out major updates in a more controlled manner and test the website afterwards.
For extensive or high-risk changes, you can create a staging environment beforehand. We explain how this works in our guide Create a WordPress Staging Environment: Safely Test Changes with Softaculous.
Create a backup before important plugin updates #
Before major updates or changes to important plugins, a current backup is advisable. If unexpected issues occur after an update, this gives you a way to restore the previous state.
You should be particularly careful with extensions that deeply interfere with how your website works. These include, for example, WooCommerce, security plugins, caching and performance solutions, page builders, and plugins that manage database structures or user information.
What to do if a plugin causes problems after installation? #
Typical signs of a plugin conflict are error messages, incorrect rendering, non-functional features, or issues in the WordPress admin area.
If the problem occurs immediately after activating a new plugin, you should first deactivate the plugin in question and check whether the website functions normally again afterwards.
An error does not automatically mean that the plugin is fundamentally bad. For example, there could be a conflict with another plugin, the theme being used, the PHP version, or a specific configuration.
Troubleshooting: If a problem occurs immediately after installing or updating a plugin, this change is an obvious starting point for troubleshooting. Do not change multiple other things at the same time before you have narrowed down the cause.
What to do if WordPress is no longer accessible after activating a plugin? #
In rare cases, a faulty or incompatible plugin can prevent you from opening the WordPress admin area normally. In that case, the plugin can no longer be deactivated via the usual plugin management.
In such situations, the plugin can be deactivated, for example, via the file manager in cPanel or via FTP by temporarily renaming the respective plugin folder.
The installed plugins are usually located under:
wp-content/plugins/
If you are unsure about such an error, you should not delete files at random. When in doubt, contact CURIAWEB support before making any further changes to a live website.
Disabling is not the same as deleting #
A deactivated plugin is no longer executed regularly by WordPress, but its files still remain on your hosting. In addition, many plugins keep their settings and data in the WordPress database so that they are available again if reactivated later.
If you are sure that you will no longer need a plugin permanently, you can delete it after deactivation.
We explain how to proceed correctly and what to consider before deleting in the article Deactivate and delete WordPress plugins, which we also cover in this knowledge base.
Do not simply leave unused plugins installed #
Sometimes, numerous deactivated plugins accumulate in a WordPress installation over time. That is not a sensible form of archiving.
If you no longer need a plugin permanently, you should check whether it can be deleted. Even deactivated software can contain files that may become outdated at some point and would still need to be maintained.
Therefore, keep only extensions for which there is a comprehensible reason.
Plugins are not the same as themes #
A Theme largely determines the appearance and basic presentation of your WordPress website. A Plugin on the other hand, mainly adds functions.
The boundaries can sometimes overlap because themes can bring additional features and plugins can also bring visible design elements. Nevertheless, this distinction is important for understanding WordPress.
We explain how themes work and how to install a new theme in our guide Install and activate WordPress theme.
Plugins on a cloned or staging website #
When you clone a WordPress website or create a staging version using Softaculous, installed plugins are normally copied along with the website.
This is practical for testing: you can update an existing plugin or try out a new extension on a copy first.
Learn how to create a standalone copy in our guide Cloning WordPress: Copying a website with Softaculous.
Summary #
WordPress plugins expand your website with features that are not included in the WordPress core or not in this form. You can install free plugins from the official WordPress directory directly via „Plugins“ > „Add Plugin“ search, install and activate. Premium plugins are often uploaded as a ZIP file via the function „Upload plugin“ Installed.
Install only plugins from trusted sources and check their currency, compatibility, reviews, and maintenance status before installation. Keep the extensions you use up to date and remove plugins that you no longer need permanently.
For extensive updates or technically important plugins, it is recommended to check a backup beforehand or test the change on a Staging website to be tested. This allows WordPress to be flexibly expanded without unnecessarily compromising security and stability.
