What Is A Plugin?

Date First Published: 14th November 2023

Topic: Computer Systems

Subtopic: Computer Software

Article Type: Computer Terms & Definitions

Difficulty Level: 4/10

Learn about what a plugin is in this article.

A plugin is a software component that extends the functionality or adds additional features to another program. They allow users to customise the appearance and functionality of a program or application as they like, providing more flexibility without altering the main program or application. Most plugins are available free of charge, but some premium ones may require a fee.

Uses Of Plugins

Uses of plugins include:

• Web browsers - These use extensions to add new features and are distributed as source code instead of compiled software. For example, if users want to block ads, they may need an adblock plugin to do so. Every web browser has an official website where users can download and install plugins and the publisher verifies that the plugins are not harmful or malicious before making them available to download.
• CMS - A CMS, such as WordPress allows users to install plugins to add extra functionality to websites. Examples of plugins are like buttons, SEO analysers, and form handling services. WordPress plugins can be downloaded from the official website or third-party sources. However, plugins from third-party sources can contain viruses and malware, so it is only recommended to install them directly from the official website.
• Editing software - Software for editing images, videos, and designing graphics often includes support for plugins to provide improved compatibility for certain file types. For example, a plugin for Photoshop may add new filters and editing tools.

Tips For Choosing A Plugin

Some tips for choosing a plugin are:

• Research before installing. Before choosing a plugin, always ensure that it is suitable for the tasks you want performed with it. Plugins won't be useful if they don't add any value.
• Be selective with your downloads. The more plugins you install, the slower your program, application, or web browser will run. Before installing a plugin, always consider whether you really need the plugin. You may already have a feature that is capable of doing what you want to.
• Keep the plugins up to date. Updates can fix security vulnerabilities and bugs discovered by other users. Outdated plugins can be a threat to security, so ensure that you are keeping them up to date.

Difference Between A Plugin, An Extension, and An Add-On

Plugins, extensions, and add-ons are very similar. However, plugins and add-ons are used more for programs and applications, whilst extensions are used more for web browsers.

Spelling

This term can be spelt "plugin" or "plug-in". Both spellings have been used. However, "plugin" is the most commonly used spelling and most individuals and organisations have opted for the non-hyphenated spelling for simplicity.

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