Ad Highlighter is a free Google Chrome extension designed to enhance your browsing experience by highlighting banner advertisements, sponsored links, and certain video ads on webpages. This tool enables users to quickly identify where advertisements are placed, making it easier to navigate content without distractions. By visually marking ads, it aids in distinguishing between organic content and promotional material, which can be particularly beneficial for users looking to minimize exposure to advertisements while browsing.

While Ad Highlighter serves its purpose, it operates on a basic level, focusing primarily on checking property values of HTML tags against a limited set of strings. Unlike more comprehensive ad blockers that utilize advanced algorithms to detect a wider range of advertisements, this extension may result in several false positives and negatives. Therefore, users should be aware that its functionality is somewhat rudimentary, and it may not catch all advertisements effectively.