The green shape is the area on your website's map today. It matches what Google showed for your Business Profile on October 21. Change it as much or as little as you like, then send it to us. Nothing on your website changes until we've checked it with you.
It's easiest on a computer, but it works on a phone too.
Move a corner: drag it. Or click a corner, then click the spot on the map where it should go.
Add a corner: click a + between two corners.
Remove a corner: click it, then press Remove corner.
Keyboard: Tab to a corner and use the arrow keys (hold Shift for bigger steps). Delete removes it.
Edit
When you're done:
If no email window opens, and paste it into a reply to Ben's email.