Two things, and one decision.
The two things
A connected Google Ads account - the wizard lists the accounts linked to your agency; you pick which one the campaign will be created in.
A landing page URL - the only input the AI needs to understand your business.
The decision: which URL?
Use the page that best represents what you want this campaign to sell. If the campaign is for the whole business, a strong homepage works. If it's for one product line or service, use that page - the AI builds its entire understanding from what it reads there, so a focused page produces a focused campaign.
RELATED ARTICLES
The Setup step
Name, goal, voice, account and URL - the five inputs.
Discovery - how the AI learns your business
Your page is read and distilled into an expert brief.
Best practices
The habits that separate good campaigns from great ones.
