What do you think is the best format for proposal for marketing services such as SEO, content marketing, social media, etc.? How should you structure the presentation? What should you include and what you should not?
Have a template that defines the project's goals, the plan (who does what, and when), the price, and any terms and conditions. Then, ask the prospect what they would like to see in the proposal. If they don't know, or completely agree with what you already have, just use your template. If they say "I need to show XYZ to get approval", make sure you include XYZ.