Each time you open your private accounts on other computers it saved on the browsing history of the browser and it became visible to others who use the same compute. Incognito mode can be used if you want your browsing activities to be kept secret, or if you use a public computer and are concerned about safety and privacy.While you are using incognito mode, Webpages that you open and files that you download aren't recorded in your browsing and download histories. All new cookies are deleted after you close all incognito windows that you've opened. And the best thing is Changes you make to your Google Chrome bookmarks and general settings while in incognito mode are still saved.
How to active Incognito :

1. Launch the Chrome browser on your computer
2. Click on the ≡ (Chrome menu) located in the toolbar.
3. Click on “New incognito window.”
A new Incognito window will open on your computer
However, you can not be invisible. Going incognito doesn't hide your browsing from your internet service provider, or the websites you visit.
How to active Incognito :

1. Launch the Chrome browser on your computer
2. Click on the ≡ (Chrome menu) located in the toolbar.
3. Click on “New incognito window.”
A new Incognito window will open on your computer
However, you can not be invisible. Going incognito doesn't hide your browsing from your internet service provider, or the websites you visit.