Plugins make the internet more customizable and smoother to run. But how do they do it and how do you use them effectively? 

What is a Plugin? 

A plugin is a piece of software that adds functionality to computer programs, apps, websites, and web browsers without altering the code for the host program. Over the years, plugins have played an integral role in making sure online activities like viewing documents, watching videos, and listening to audio run smoothly. 

Basically, they’re the reason the internet isn’t still just blocks of plain text on a computer. If you’re creating your own website, SEO plugins help your website rank higher on search engines. YouTube and Vimeo plugins can seamlessly play videos. A plugin can even customize your fonts. 

Is it Plugin or Plug-in? 

Short answer: typing the word with and without the hyphen can both be correct. The Microsoft Manual of Style says the version with the hyphen is correct, but the version without the hyphen is more commonly used by other companies. They can also be called an add-in, addin, add-on,  addon or extension if it’s added onto an internet browser. 

A closeup of a dictionary page

Why Are Plugins Used?

Plugins can serve a variety of purposes , including but not limited to:

  • For third-party developers to extend an application
  • Easily adding new features
  • Support different file formats
  • SEO 
  • Cache programs for increased speed
  • Content backups
  • Generate contact forms
  • Audio editing software
  • Decrypt and encrypt emails
  • Spam filters for comment sections
  • Support different programming languages

A time-lapse photo of stars

Examples of Plugins

Many once-essential plugins have been replaced by browser extensions, for example, HTML 5 has eliminated the need for the Adobe Flash plugin, so Adobe discontinued it in 2020. However, there are still some foundational plugins that assist with everyday internet use, including: 

Where to get Plugins for Your Browser

Internet browser plugins are also called extensions. Each browser has their own page to install plugins:



Install Page

Google Chrome

Chrome Web Store

Mozilla Firefox

Add-Ons for Firefox

Apple Safari

Safari Add-Ons

Microsoft Edge

Microsoft Edge Add-Ons


Plugins vs. Widgets

Plugins and widgets can be similar, but have differences in their web development and function. If you’ve clicked a share button to social media, you’ve interacted with a widget. Let’s break down those differences:




Downloadable piece of software

Drag and drop content

Add functionality to a site

Add a block of content to the front end

Site visitors don’t interact with them

Site visitors do interact with them


Plugin Tips

Effective use of plugins and browser extensions is about more than installing them and . Follow these tips to manage your plugins effectively. 

Less is More

Each active plugin on a website slows it down. It’s not noticeable when it’s just one slowing it down by five milliseconds, but the more you stack them up, the more it compounds the slowdown. 

Short succulents against a white background

They Should Serve a Specific Purpose

 To keep your website running smoothly and keep your third party functions manageable, don’t install plugins unless they serve a necessary function and avoid installing multiple with overlapping purposes. 

A jigsaw puzzle with a missing piece

Keep Them Updated

Developers update plugins periodically to add new functionality, fix bugs, and keep up with changes to the host program. 

Code on a computer screen

If You’re Not Using It, Uninstall It

Some people keep inactive plugins installed on their sites by disabling them but not deleting them. They can still be a security risk, so you’re better off to uninstall them altogether. If you want to start using it again, you’re always welcome to reinstall. 


Know Your Sources

Anyone with coding skills can make a plugin. That means some of them may not be trustworthy or have users’ best interests in mind. That’s why you should only use plugins supported by your website builder or are made from trusted third party developers. 

A scientist using a microscope

If Your Website Stops Working, It Could be a Plugin’s Fault

Sometimes plugins interfere with the proper functioning of your website. If you run into a problem you have to troubleshoot while you have a plugin installed, one of your first steps should be to see if it works without the plugin running. 

Multiple people pointing at a laptop screen

How to Choose the Right Plugins

Free Plugins

Some free plugins might be useful, but it’s important to keep in mind that if you use one, you’re not paying for the work the developers did to create it and you may not get updates and the features that you need for free. Here are a few questions you should know the answer to before you use a free plugin: 

  • How long has it been since the plugin was updated? 
  • Is it compatible with the latest version of the host program? 
  • How do other users rate it? 
  • How’s the customer support? 

Premium Plugins

Premium plugins do cost money, but the cost doesn’t just cover the function of the plugin. It also comes with 

  • Additional features
  • Priority customer support
  • Documentation
  • Regular updates

You may be able to get what you need from the free version at first, but need the premium later on as your business needs increase. 

How Sav Can Help

A beautiful, professional website with all kinds of functions is in your reach, regardless of your tech skills. You can start with one of our responsive templates and customize your features from there. Start building with us today to find out how!

Luca Harsh

Luca Harsh

Luca Harsh is an in-house content writer for Sav. They live in Chicago with their cat, Polly. Yes, Harsh is their real last name.