Setting up a Service Area Business correctly
In your GBP settings, hide your address and add up to 20 service area regions. For Toronto-based SABs, list specific neighbourhoods and surrounding GTA cities (North York, Scarborough, Etobicoke, Mississauga, Vaughan, Markham) rather than the whole 'Greater Toronto Area' as a blob.
If you serve customers at your address AND travel to them (a hybrid like a salon that does mobile work), you can show your address publicly and still define a service area.
How SABs rank in the Map Pack
SABs rank based on the searcher's location relative to your stored business address — not relative to the service areas you list. This is why most service contractors only rank well in the Map Pack within ~5–10 km of their actual address.
The way to expand reach is to build neighbourhood-specific landing pages (e.g., /etobicoke-plumber, /north-york-electrician) that rank in organic results for those geo-keywords, even if the Map Pack stays local.