Lead Conversion is the process of turning a potential customer (lead) into an actual paying customer. It marks the point where interest shown by a lead results in a completed sale or a desired action that moves the lead further down the customer acquisition funnel.
Synonyms: Lead Conversion Rate, Lead to Customer Conversion, Sales Conversion, Customer Conversion

Lead conversion happens after a lead has been generated and nurtured. It involves engaging the lead through targeted communication, addressing their needs, and providing solutions that encourage them to make a purchase or commit to a service.
Converting leads is essential because it directly impacts a business's revenue and growth. High conversion rates mean that marketing and sales efforts are effective, turning interest into tangible business results.
A website visitor filling out a contact form and then making a purchase is a lead conversion. Another example is a potential client responding to a sales call and signing a contract.