Search for a plumber from a phone in Ballard, then again from Bellevue or Federal Way, and the local pack reshuffles almost entirely. Google leans on proximity, and this metro is carved up by water: Elliott Bay, Lake Union, Lake Washington and the long shoreline down to Tacoma. People think in terms of which side of the bridge they live on, and a business that ignores that habit tends to rank only near its own door.
King, Pierce and Snohomish are three audiences
Downtown and the neighborhoods north of the ship canal lean toward renters, young professionals and dense retail streets. The Eastside around Bellevue, Kirkland, Redmond and Issaquah mixes corporate campuses with affluent households who compare vendors carefully. Pierce County around Tacoma and Puyallup, and Snohomish County around Everett and Lynnwood, have their own trades, port work and family services. Your site should say plainly which of these you handle instead of stacking suburb names in a footer.
Traffic and ferries shape intent
Congestion on the bridges and the ferry runs to Bainbridge and Vashon make distance feel longer than it looks. Searchers add neighborhood names, ask about parking, weekend hours or whether a crew will travel to the islands. Pages that answer those questions earn clicks that generic city pages miss.