MQL vs SQL: the line nobody in your funnel has actually drawn.

Ask your sales team what makes a lead "sales qualified."
Then ask marketing the same question.

Write down both answers.
Compare them.

If they don't match, you don't have a lead problem.
You have a definition problem, and it's costing you pipeline every single week.

What the letters actually stand for

MQL. Marketing Qualified Lead. Someone marketing believes is worth sales' time, based on behavior: downloaded something, visited the pricing page twice, opened the last six emails.

SQL. Sales Qualified Lead. Someone sales believes is worth working, based on a conversation. Budget, authority, need, timeline, or some version of those four questions.

Two different teams. Two different definitions of "ready." In most companies, nobody ever sat down and made the two definitions agree.

The relay race nobody trained for

Picture a relay race. The baton is the lead. Marketing runs the first leg. Sales runs the second.

In a good relay, the handoff is rehearsed. Both runners know the exact spot, the exact grip, the exact moment to let go and take hold.

In most B2B pipelines, the handoff has never been rehearsed once. Marketing tosses the baton over its shoulder and keeps running. Sales either catches it, or it hits the ground and nobody notices for three weeks.

That's the MQL to SQL handoff in most businesses I've looked at. Not malicious. Just never designed.

Where the leak actually happens

The leak isn't at the top of the funnel. Founders love to blame lead volume. "We just need more leads."

The leak is almost always at the handoff. Marketing calls something an MQL. Sales gets it, decides it's not real, and lets it die quietly instead of sending it back with a reason.

Nobody tracks the leads that get silently dropped at the handoff. So nobody sees the leak. They just see a pipeline that never quite hits the number, and a slow argument between two departments about whose fault that is.

The fix isn't more leads. It's a documented definition both teams actually agreed to, in writing, before the argument started.

What a real definition looks like

A working MQL/SQL definition is not a feeling. It's a short document. Specific triggers. Specific thresholds. Specific criteria both teams signed off on, in a room, before a single lead moved through it.

It answers exactly what behavior earns the MQL label. Exactly what qualifies a lead to become an SQL. And exactly what happens to a lead that gets rejected at the handoff. Where it goes. Who owns it next. Whether it comes back around.

Not guesses. A process anyone on either team could run without you in the room.

Why this matters more than the acronyms suggest

This isn't just a sales-ops problem. Every business eventually gets a serious look from someone deciding whether to buy it, invest in it, or fund its next round.

When that happens, someone asks how a lead becomes a customer. If the honest answer is "marketing sends stuff over and sales figures it out," that's not a process. That's a hope.

A documented, working handoff between MQL and SQL is a small thing. It's also exactly the kind of small thing that turns "we think our pipeline works" into "here's the process, and here's how long it's been running correctly."

Systems over heroics. Even at the level of two acronyms.