You can save your current tab as a bookmark in a few different ways.
If you're on Windows, you'll use Control (Ctrl).
Note: If you're on a Mac, you'll use the Command (Cmd) key. Here are a few ways to turn your toolbar on again if you ever find it missing. The toolbar was probably hidden on accident. If you’re having trouble finding your bookmarks, don’t worry. If you can’t find the Chrome bookmarks bar, follow the instructions below for finding your missing bookmarks. It’s always there, unless you turn it off.
The toolbar is a horizontal row of bookmarks that you can find directly below the Chrome search bar (also known as the address bar or the URL bar).