I start with the searches that are actually buying the traffic.
The paid search case studies usually start by separating useful intent from broad, expensive, or misleading queries that make the account look busier than it is.
I tighten budget around intent.
Budgets, geos, match types, negatives, and campaign structure should make it harder for spend to drift into searches that do not support the offer.
I connect campaigns to the page people land on.
Ads, keywords, and landing pages have to reinforce the same promise, otherwise the account can pay for interest that the page cannot convert.
I make conversion tracking usable before optimizing too hard.
If the account is optimizing around bad or missing events, the first job is to clean up the signal so performance decisions are not built on noise.
I judge the account by lead quality and cost, not activity.
The useful story is whether spend, CPA, conversion volume, and qualified opportunities improve together, not whether more changes were made.