You work in a large ad agency. Your customer wants to launch a PPC campaign similar to his competitor’s campaign. You need to prove the effectiveness of your strategy to the customer. Which Semrush tool will help you get insight on this competitor’s promotions and evaluate his ad budget?

Advertising Research is the correct tool because it provides detailed insights into a competitor's paid search campaigns, including their ad copy, keywords, landing pages, and estimated budget. This allows you to analyze their promotional strategies and evaluate their ad spend, directly addressing the customer's need to understand a competitor's campaign and budget. PLA Research focuses specifically on Product Listing Ads (shopping ads), which is a narrower scope than general PPC campaign analysis. Keyword Gap identifies missing keywords in your own campaign compared to competitors, but it doesn't offer a comprehensive overview of competitor ad strategies or budget estimations.