Your computer stores links to each web site visited by you in the History (or alike) folder of your browser. It also keeps contents, such as pictures, texts, flash movies, audio files, of the web pages visited by you. It also stores cookies from the web sites visited by you. Cookies are small files that web sites store on your computers for identification purposes. Web passwords and all other information you might enter filling web forms are also stored on your computer. Any snooper who has access to this information can easily tell where and when you have been, or how long you have been on a certain web site. Deleting internet cache and history will not help, as macOS stores such information in many, and not easily accessible, places. R-Wipe & Clean for Mac irrecoverably deletes such information and files.
Your computer stores links to all recently opened documents, started programs, recent places and servers, search results, etc. macOS and other programs store their cache files in special folders. Such cache files contain data from your permanent files. R-Wipe & Clean for Mac irrecoverably deletes such links and files.
You may also clean links to files open by a number of applications.