01
Campaign: define the economic job
Use the campaign level to define objective, budget, dates and the commercial role of the initiative. Avoid mixing fundamentally different business outcomes into one campaign if it makes optimization impossible to interpret.
02
Ad group: one coherent need
Group ads around a shared product, service, theme or customer need. Separate materially different situations when they require different creative or landing pages.
03
Context hints: explain relevance
Write hints that add useful information about the offer, customer and situation. They should not be used as instructions like exact-match keywords or hard delivery restrictions.
04
Creative: multiple distinct angles
Use several genuinely different title and description angles within an ad group so the platform has broader coverage while the experiment remains interpretable.