KeywordSearch is an AI-powered tool designed to enhance ad audiences and keyword research for Google and YouTube. Its key features include AI Audience Builder, which streamlines the creation of ad audiences using AI algorithms, Keyword Topic Auto Expansion for content optimization, and YouTube Ad Spy for competitive insights. It serves marketers, businesses, and content creators, aiming to improve ad performance and audience targeting. Additionally, KeywordSearch offers resources like a blog and academy for learning marketing strategies. Pricing details and trial options are available on their website.