I start by deciding what deserves a rebuild.
Some accounts need cleanup, some need a deeper restructure, and some need tracking or landing-page fixes before the campaign architecture can perform.
I rebuild around campaign ownership.
The case studies point to cleaner query control, better segmentation, tighter geos, clearer negatives, and budget moving toward searches with stronger purchase or lead intent.
I reconnect the account to conversion data.
If conversions are duplicated, missing, or poorly defined, the new structure will still optimize toward the wrong signals.
I make the landing-page path fit the new structure.
A cleaner account needs pages that reflect the same offer, location, service, or intent split the campaigns were built around.
I stabilize before pushing spend harder.
After the rebuild, I watch the account closely enough to catch bad query patterns, budget drift, lead-quality issues, and tracking problems before scaling.