Start with your business goal, not the agency's service list. Then follow these steps.
Shortlist three or four agencies with experience of a similar buying cycle. Ask each to diagnose your situation. Meet the people who will actually do the work. Insist that you own every ad account and all your data. Score every proposal against the same criteria.
PromotEdge answers these questions in the first meeting, with numbers, so you can score it against any other agency on the same sheet.
The method is the same for an advertising agency and a marketing company. Agency websites in India look very alike. Almost everyone offers strategy, creative, digital and results. The real differences show up in three places. These are the questions an agency asks before it proposes anything, the people who run your account after the pitch, and the contract.
This guide sets out a framework you can use whichever agency you choose, including if it is not us. It works for a single channel, such as SEO or performance marketing, and for a full integrated retainer.