What is a bookmark ?
A bookmark is a place holder for a web page that will allow you quick access to that page instead of having to browse to it or search for it. Instead of typing a web page in Google, clicking the bookmark will direct you to that page immediately.
How do I bookmark in Chrome mobile?
Open Chrome Browser for Android App. menu for options. Select the Bookmarks option from the list. Open the Mobile Bookmarks folder — all the Chrome Android bookmarks will be available.