A two-flat landlord and a Lincoln Park homeowner should not share a campaign
Three buyers hide inside a window and door account, and averaging them produces a cost per lead that describes nobody.
The whole-house homeowner is a long consideration, high ticket, multiple quotes, decided over weeks. The entry or patio door buyer is faster and smaller. The two-flat or three-flat owner is buying openings by the dozen and thinks in per unit pricing.
Each one deserves its own campaign, its own budget and its own landing page. Their keywords barely overlap and their acceptable cost per job differs by a wide margin.
Blend them and the account optimizes toward whichever is cheapest to acquire, which is almost always the smallest job. You end up buying door handles with a budget meant for whole elevations.
Naming the campaigns after the buyer rather than the product keeps the reporting honest when somebody else looks at it in six months.