Greg K.SEO and analytics at Adcore · LinkedInA sales lead is a potential customer who has shown interest in your product and left contact details: filled out a form, sent a message or called. The term comes from the verb “to lead.” A lead isn’t a buyer yet, and that’s the trap: an agency can honestly report hundreds of leads while the sales team has two deals. Below: where they get lost and how to measure it. If you were looking for the heavy metal, we don’t cover that here.
What is a lead in plain English
Someone sees an ad for a kitchen, visits the website and leaves a phone number. From that moment, they’re a lead: you have a contact and interest, but no purchase yet. There’s no single definition, by the way. Diia.Business, the Ukrainian government’s portal for entrepreneurs, counts even someone who merely followed a link as a lead, and in the same place honestly adds: “Every business defines leads in its own way.” That one sentence explains most of the arguments between marketing and sales.
Lead is also a journalism term, for the opening paragraph of a story. But in marketing, CRM and targeted advertising, it always means a potential customer.
Why so many leads, but only two deals
Picture a typical monthly report: 312 leads at 140 UAH each. It looks great. Now let’s open the CRM.
A hypothetical example. The percentages depend on the niche: yours will be different, and you can work out your own below.
Nobody in this story is lying. The agency counts inquiries, sales counts money, and those are different numbers. It’s easy to get inquiries cheaper by widening the audience or simplifying the form. Quantity goes up, quality goes down, and the report reads like a celebration.
We found no independent figures on what share of inquiries is fake: everything floating around online comes from companies that sell protection against it. But Google’s own help pages explicitly advise protecting lead forms with reCAPTCHA, double opt-in and server-side validation. So the problem is real.
Take a month’s figures from your ad account and CRM. The starting numbers come from the example above.
It’s only as good as what you enter: count as qualified only the leads your sales team has accepted.
Types of leads: cold, warm, MQL and SQL
By temperature: a cold lead has just heard of you, a warm one is already comparing options, a hot one is ready to buy now. By who accepted them, leads break down like this:
| Name | What it means | Who decides |
|---|---|---|
| Lead | There’s a contact and some interest | The system counts it automatically |
| MQL, marketing qualified | Interested, but not yet ready to talk about buying | Marketing |
| SQL, sales qualified | Vetted and ready to talk to a sales rep | Sales |
| Deal | A sales rep is moving it toward a purchase | Sales, in the CRM |
You don’t have to memorize the names. One thing matters: your company should put in writing the moment an inquiry becomes qualified. Someone asks the price of a kitchen in a city you don’t serve? Then it’s not a lead, even though your ad account counts it as a conversion.
What is lead generation
Lead generation is everything that brings in new potential customers’ contact details: search ads, targeted ads, SEO, email campaigns, webinars, trade shows. A lead generator is a person or service that does this. There’s also a market for ready-made leads, where contacts are sold one at a time. There, it’s worth asking whether the same contact is being sold to several companies at once.
Don’t confuse it with lead management, which begins where lead generation ends: handling the inquiry, the call, statuses in the CRM. And that’s the stage where money most often gets lost.
How to calculate cost per lead
Cost per lead, or CPL, is the budget divided by the number of leads. In our example, 43,680 UAH divided by 312 gives 140 UAH. That number alone isn’t enough to make decisions, so two more are added: cost per qualified lead (1,680 UAH) and cost per deal (21,840 UAH). The last one shows whether the advertising pays off. How to translate it into profit, we explain in our article on ROI.
What’s a normal cost per lead? There’s no general answer. A kitchen lead at 3,000 UAH can be profitable, while a coffee lead at 300 UAH isn’t. Work backward: how much you make on one deal and how many inquiries it takes to land one. We found no primary data with a real sample behind the lead conversion benchmarks floating around online, so we don’t quote them.
Both big platforms let you train your ads on quality leads. Google offers “qualified lead” and “converted lead” goals using data from your CRM, while Meta offers optimization for conversion leads. Google advises uploading data daily, and for the system to learn, you need roughly 15 conversions or more in 30 days. This changes everything: the ads look not for people who fill out a form but for people who buy.
How quickly to call a lead back
The faster the better, but the well-known figure needs some explaining. The “five-minute” rule comes from a 2007 study by InsideSales.com and James Oldroyd of MIT: 6 companies, more than 15,000 leads. The chance of reaching a lead called within 5 minutes rather than 30 was 100 times higher, and the chance of qualifying it 21 times higher. A caveat: the study came from a CRM vendor, it’s almost twenty years old, it’s about phone calls, and it didn’t measure actual deals.
The logic still holds today, because people usually submit inquiries in several places and buy from whoever answers first. Here’s a simple test: fill out the form on your own website during business hours and time how long it takes to get a call. You’ll also find out whether the inquiry got through at all.
What to put in an agency contract
- What counts as a lead. A unique contact, the target service, your region. Duplicates and spam don’t count.
- Who confirms quality, and when. The sales team sets the status in the CRM within an agreed time frame.
- Which metric comes first. Cost per qualified lead or per deal, not per inquiry.
- How data gets from the CRM into the ads. Without it, the system learns from raw inquiries.
- Who owns the accounts. Ads and analytics must stay in your accounts.
At Adcore we build advertising around the cost of a deal: we connect ads, analytics and CRM so you see what each campaign sells, not how many inquiries it collected. Performance marketing at Adcore.
Frequently asked questions about leads
How is a lead different from a customer?
A lead has only shown interest, while a customer has already bought. “Potential customer” is a broader term: it can be anyone in your audience, whereas a lead has already done something and given you a way to reach them.
How is a lead different from a deal?
A deal is a purchase agreement in progress, handled by a sales rep. In many CRMs, a lead becomes a deal after qualification.
What is a lead in targeted advertising?
Someone who filled out a form inside a social network or on a website after seeing an ad. Forms inside social networks are convenient, but the inquiries they produce are often less considered, so check their quality separately.
What makes a lead a quality lead?
The person really wants your service, can pay for it, and the contact details work. The exact criteria are set by your sales team.
What is a lead magnet?
Something useful offered in exchange for contact details: a checklist, a free estimate, a trial lesson. It increases the number of leads, so cost per deal has to be tracked separately.
Sources
The Diia.Business quotation is our translation.
- What a lead is and how to work with leads (in Ukrainian), Diia.Business, 2025.
- Sales lead, HubSpot.
- Sales Qualified Lead, HubSpot, July 2026.
- MQL vs SQL, Salesforce, January 2024.
- Best practices for lead generation, Google Ads Help.
- Qualified and converted leads, Google Ads Help.
- Invalid clicks, Google Ads Help.
- Lead Response Management Study, InsideSales.com and MIT, 2007.