Which SEMrush tool helps compare the audience size and source traffic of up to 5 websites?

Traffic Analytics is the correct answer because it provides detailed insights into website traffic, including audience size, traffic sources (direct, referral, search, social, paid), user engagement metrics, and geographic distribution for up to five domains simultaneously. This allows for direct comparison of competitors' performance. Brand Monitoring tracks mentions of a brand online, not traffic metrics. Domain Overview gives a high-level summary of a single domain's performance, but lacks the detailed comparative traffic analysis of multiple sites. Keyword Gap identifies missing or underperforming keywords between domains, which is different from analyzing overall traffic and audience size.