SEMrush is an all-in-one online visibility and marketing analytics platform. It offers a comprehensive set of tools for digital marketers, SEO professionals, and businesses to optimize their online presence. Key features include:

1. Keyword Research: Identifies relevant keywords, analyzes their search volumes, and assesses the competition.

2. Competitive Analysis: Evaluates competitors' online strategies, including keywords, backlinks, and advertising.

3. Site Audit: Scans websites for SEO issues, providing insights for optimization.

4. Backlink Analysis: Examines a website's backlink profile and helps with link-building strategies.

5. Advertising Research: Analyzes competitors' ad strategies and provides insights for online advertising campaigns.

6. Social Media Management: Assists in scheduling and analyzing social media posts.

SEMrush is a versatile tool for understanding and improving various aspects of online visibility, SEO, content marketing, and paid advertising.