Separate intent when economics or control differ.
Brand queries usually behave differently from generic category and competitor terms. Give distinct intent groups their own budgets and bid logic when the volume justifies it.
Use discovery as an input, not a destination.
Broad and Search Match campaigns should feed a regular search-term workflow. Move proven terms into exact campaigns and add negatives to reduce internal competition.
Avoid fragmentation before there is data.
Splitting every audience, device, or keyword into a separate campaign can starve learning and create maintenance cost. Start with the boundaries needed for budget, geography, and intent.