- SMM (Social media marketing)
- Social Traffic
- Sponsored
- SSL Certificate
- Structured data (markup)
- Subdomain
- Subfolder
- TF-IDF (Term Frequency — Inverse Document Frequency)
- Time on Page
- Title Tag
- TLD (Top Level Domain)
- Topic Efficiency
- Total Addressable Market (TAM)
- Total Blocking Time (TBT)
- Total Engagement
- Tracking Code
- Traffic Cost
- Traffic % (in the Organic Positions & Advertising Positions reports)
- Trend (in Semrush)
- Tweet Listings
- Twitter Cards
- Twitter Engagement
- UGC (User-generated content)
- URL (Google Ads)
- URL (Landing page)
- URL (Uniform Resource Locator)
- Visibility %
- Volatility
- Volume (Search Volume)
- White Hat SEO
