Extensions, available for Google Chrome in Windows, are a great way to add more features and functionality to the browser. Sometimes, a feature is really useful for some people, but not for everyone. Extensions let you customize Google Chrome with features you like, while keeping your browser free of clutter that you don’t use.
There are different types of extensions which is very easy to install
These extensions add a button next to the Page and Tools menus to let you conveniently perform a task (such as accessing a site or checking for updates) no matter what page you’re visiting.
These extensions can detect whenever you’re on a certain type of page and display an icon in the address bar. Click the icon to do an action on the page
These extensions can directly interact with the page you’re visiting.
You can install extensions from Google Chrome Extension Gallery