The percentage of website visitors who complete a desired action — calling, filling out a form, or making a purchase. The primary measure of a website's commercial effectiveness.
Conversion rate is the percentage of website visitors who complete a target action — most commonly submitting a contact form, calling a phone number, making a purchase, or signing up for a service. It's calculated as: (conversions ÷ total visitors) × 100. A service business website with 500 monthly visitors and 10 form submissions has a 2% conversion rate.
Conversion rate is the most direct measure of a website's commercial effectiveness. Two businesses can have identical traffic volumes and radically different revenue outcomes based on conversion rate alone. A site converting at 5% generates 2.5 times more leads than one converting at 2% — from the same number of visitors. This is why conversion optimization often has a higher ROI than traffic generation.
For service business websites, a realistic target conversion rate depends on the traffic source and service type. Visitors from branded search (people searching your business name) convert at 10–25%. Visitors from non-branded local search convert at 2–8%. Cold paid traffic typically converts at 1–4%. These benchmarks should inform both design decisions and advertising strategy.
The most common conversion rate killers on service business websites: unclear value proposition, no visible phone number, friction-heavy contact forms, slow mobile load times, and design elements that erode trust (stock photos, outdated styling, no real reviews). Fixing these foundational issues typically moves conversion rate more than any single design change.