Funnel, leads and sales

What is a lead in marketing

Also known as: qualified lead, prospect, lead generation

Rodrigo Fávaro Founder of ROO3

Published September 30, 2026

Short answer

A lead, in marketing, is a person or company that showed interest in what you sell and left a way to be contacted, such as a name and phone number in a form or a chat message. It is a potential customer, not a customer: between the lead and the sale there is still qualification, conversation and a decision.

Hypothetical example

A coding school publishes a free guide to careers in tech. To download it, people enter their name, email and what they plan to study. In one month, 800 people download it: that is 800 leads.

Of those, 120 say they want to start within three months and have the age and availability the course requires. Those 120 are qualified leads, and they are the ones the sales team calls first.

Where the word comes from

In this sense, a lead is a clue: a hint of a possible sale. The work of attracting these contacts is called lead generation.

Types of lead

The most common stages
	What it means
Lead	Left contact details, with no filter
Qualified lead	Fits the profile of customer the company serves
MQL	Marketing considers it ready for a sales approach
SQL	Sales accepted it and will work the opportunity

Names vary from company to company. What matters is that everyone uses the same definitions.

How to generate leads

Ads with a form or a message, on Google and social media, leading to a page with a clear offer.
Useful content, such as articles, guides and calculators, that attracts people researching the topic.
Lead magnets, free materials offered in exchange for contact details.
Events and webinars, with registration.
Customer referrals, which usually bring the most qualified leads of all.

A lead is not a customer: what to do after capture

The most expensive mistake in lead generation is treating every contact as ready to buy. Someone who downloaded a guide out of curiosity does not want a sales call the next day, and someone who asked for a quote does not want to wait three days for an answer.

The right path sorts leads by moment. Those who are ready get a fast response from sales. Those still researching get content that helps them decide, called lead nurturing, until they show signs they are ready.

What to measure

CPL: what each lead costs.
Qualification rate: how many fit the customer profile.
First response time: how long the company takes to reply.
Lead-to-sale rate: how many become customers.
Source: which campaign, ad or page each lead came from, to know where to invest more.

Frequently asked questions

What is a lead?

A person or company that showed interest in what you sell and left contact details, such as a name and phone number. It is a potential customer.

What is the difference between a lead and a customer?

A lead showed interest; a customer bought. In between there is qualification, conversation and a decision, and most leads never buy.

What is a qualified lead?

A lead that fits the profile of customer the company serves, such as size, budget, region or a need that matches the product.

What is lead generation?

The work of attracting people who might become customers and getting their contact details, through ads, content, events and referrals.

Does a chat or messaging contact count as a lead?

Yes, if the company defines it that way and records the contact. What matters is always using the same definition, so metrics can be compared.

Related terms

Sources

Rodrigo Fávaro

Founder of ROO3, a marketing and technology agency in São José do Rio Preto, Brazil. Builds AI products running in production (Tobia, gerar.app, Pense Mercado) and maintains the AI Benchmark, a public ranking of AI models.

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