"Long Tail Pro" is a keyword research tool that helps users find low competition keywords for their websites. It has features such as the keyword competitiveness score, competition analysis, rank value, rank tracker, and advanced filters. However, reviews on Trustpilot indicate mixed experiences with the tool. Some users have praised its ability to generate related keywords and analyze search engine results pages (SERP), while others have reported issues with the tool's functionality and customer service. It's recommended to do thorough research and consider other options before making a purchase.