When you access the same spaces often, it can be helpful to favorite them. Favorite spaces appear in your navigation bar, directly below the main menu.
To favorite a space, first go to the space itself. To do this, simply click on its title in the navigation bar.
Once in the space, click on the star icon in the top banner. The space will then be added to the navigation bar.
Click on the same icon again to remove the space from your navigation bar.