Alexa Marketing Stack is a marketing management software that helps businesses improve their SEO and PPC strategies by identifying keywords, benchmarking performance against competitors, and analyzing onsite traffic. It offers a keyword analysis module to optimize content and reach the target audience, as well as website analysis functionality to discover competitors' traffic, keywords, backlinks, and marketing strategies. Other features include an on-page SEO checker, content exploration, and the ability to create multiple workspaces and projects to organize search results and site evaluations.