Use the bookmarks feature in GNOME Files to quickly jump to your favorite directories from the sidebar.
Switch to the directory for which you want to create a bookmark in the content area.
Click the list icon, then select Bookmark this Location from the menu.
The bookmark now appears in the sidebar, with the directory name as the bookmark name.
(Optional) If you want, you can change the name of the bookmark. This does not affect the name of the bookmarked directory itself. To change the name, right-click the new sidebar item and select Rename.
(Optional) If you want, you can change the order in which the bookmarks are displayed. To reorder, click a bookmark and drag it to the desired location.
To switch to a bookmarked directory, click the appropriate sidebar item.