Once you add a spaces or pages as favourites, you can see them on your dashboard or in your profile.
On the left-hand side of the Dashboard, you can see:
Recently updated content in your favourite spaces will be listed on the Favourite Spaces tab at the top right of the dashboard.
Screenshot: Viewing your favourites on your dashboard

To view your favourites in your profile:
スクリーンショット:プロファイルからお気に入りを見る

Adding Favourites
Removing Favourites
Working with Favourites