SEMrush is a popular digital marketing tool used for SEO (search engine optimization), PPC (Pay-Per-Click) advertising, content marketing, and social media management. It provides users with insights and analytics to help improve their online visibility, track competitors, and optimize their marketing strategies. SEMrush offers a variety of features, including keyword research, site auditing, backlink analysis, and more, to help businesses increase their online presence and drive traffic to their websites.