The document provides an overview of search engine advertising on Google: - Google controls 97% of search engine traffic in Belgium and advertisers can purchase keywords to display ads on Google Search and other Google properties. - Advertisers bid in an auction for keyword placements, with the highest bidder receiving top placement; advertisers only pay if a user clicks their ad. - There are various ad formats beyond basic text ads, including extensions that can include callouts, phone numbers, app links, locations, and reviews. - Campaigns should be structured with ad groups to tightly target keywords to stages of the customer journey or products. Advanced settings allow for location, device, and automation targeting. - Special ad types include Remark