Friends do you know about incognito mode, you can see incognito tab in a browser but do you know that why it is used for. If you don't know it just read this post.
If you are searching any information in your browser like Chrome, Mozilla Firefox, Opera, uc browser etc. Then the information will be saved in that browser in t he form of history cookies and cache. But if you want to search private information that can't be saved on your browser's history and you want nobody to see it then the incognito mode is an feature of browser provide you these service.
When you use incognito mode then browser does not save any history and cookies so no one can track your information.