If you are signed in to Google Chrome with a Google account with sync enabled your bookmarks with transfer automatically and you will not need to follow this guide.

This article is a continuation from this guide Backing up bookmarks in Google Chrome

Importing your bookmarks from file

Start by clicking the 3 dots in the top right corner of the window and navigate to Bookmarks > Bookmark Manager

Once in bookmarks manager select the 3 dots menu on that page

From that menu select export bookmarks

Retrieve the file from the location you saved the bookmarks backup file.