You don't have any Communities or Plans saved. How do you do that?
Within the Mattamy Homes website you can save certain Communities, Plans or Quick Delivery Homes so that you can come back and review them at a later date. Anywhere you see the save 'Heart' icon you can click on it to save that item. The icon acts as a toggle, so if you want to remove it from your My Saved list at any time, you simply click on the icon again.
Communities and Plans are stored in cookies on your computer so that when you return to the Mattamy Homes website you will be able review them again.