Add-Ons are additional features or enhancements that can be integrated into existing software or applications. They allow users to customize their experience by adding new functionalities, tools, or content that are not included in the original version. Common examples of Add-Ons include browser extensions, plugins for software like Adobe Photoshop, and extra content for video games. These enhancements can improve productivity, streamline workflows, or provide entertainment. Users can often find and install Add-Ons from official marketplaces or repositories, ensuring compatibility and security. Popular platforms like Google Chrome and WordPress offer a wide range of Add-Ons to cater to diverse user needs.