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The Madison Avenue Field GuideA field guide to marketing & advertising, by Brandon Mina

GlossaryB2B & GrowthSales Development Representative (SDR)

B2B & Growth

Sales Development Representative (SDR)

A salesperson focused on qualifying inbound leads and prospecting outbound to book meetings for account executives.

By Brandon MinaCEO, BrandPilot AIUpdated November 2026

Short answer

A sales development representative (SDR) is a salesperson focused on qualifying inbound leads and prospecting outbound to book meetings for account executives. SDRs handle the early stages of the sales process, researching accounts, running outreach sequences and screening prospects, so that closers spend their time on qualified opportunities.