Google Ads Fundamentals – Campaign Types, Auction System, and Quality Score

Campaign Types

• Search campaigns — text ads on search results
• Display campaigns — banner ads across the Google Display Network
• Shopping campaigns — product listings for e-commerce
• Video campaigns — ads on YouTube

The Auction System

Every time a search happens, Google runs an instant auction between advertisers bidding on the same keyword.

Quality Score

A 1–10 rating based on expected click-through rate, ad relevance, and landing page experience — higher scores lower your cost per click.