Actually that's another pro tip lol.
Post your service on Craiglist. Within the post place the GMB link or the GMB name and advise the prospect leads to check out your latest reviews

they can do so either by the link or googling the GMB name.. either way this helps my GMB rank since they will most likely interact with my posts and either click on the call button or visit the official website (landing page) where I collect their fb pixels for future targeting as well. If they hit the call button I lock them in on a scheduled visit from a local expert to get an estimate on site.