VBB vs Smart Bidding: what's the difference

If you've spent any time around Google or Meta ads, you've probably heard both terms thrown around as if they mean the same thing: Smart Bidding and value-based bidding. They don't. And confusing the two is one of the most common reasons campaigns underperform — you can switch on all the clever automation in the world and still get a flood of leads that never close.

Here's the short version, in plain English. One is the engine. The other is the fuel. You need both, and getting them mixed up is what trips people up. Let's clear it up properly.

Where the confusion comes from

The two terms sit right next to each other in every ad platform's settings, so it's easy to assume they're interchangeable. They're not — they answer two completely different questions.

• Smart Bidding answers: "How much should I bid in this auction?"
• Value-based bidding answers: "What is this lead actually worth to my business?"

The first is a job done by the platform's algorithm. The second is information you supply. Mix them up and you'll either expect the algorithm to read your mind, or you'll feed it the wrong signal and wonder why the results disappoint.

What Smart Bidding is: the engine

Smart Bidding is Google's name for its automated bidding engine. (Meta calls its equivalent Advantage+ and value optimisation; LinkedIn and TikTok have their own versions — same idea, different labels.) Every time someone could see your ad, there's a split-second auction. Smart Bidding decides, in real time, how much to bid for that specific person.

It does this by crunching thousands of signals at once — device, time of day, search intent, browsing behaviour, and far more than any human could weigh manually. The goal is to spend your budget on the auctions most likely to hit your target, whether that's clicks, conversions, or revenue.

This engine is genuinely powerful. But — and this is the part everyone misses — it can only optimise toward the signal it's given. Tell it to find "conversions" and it will dutifully find more conversions. It has no idea whether one was a €50,000 enterprise deal or a student who'll never buy. To the engine, a conversion is a conversion. That's where the fuel comes in.

What value-based bidding is: the fuel

Value-based bidding is the practice of telling the engine what each conversion is actually worth. Instead of reporting "a lead happened," you report "a lead happened, and it's worth €640." Now the engine has something far richer to optimise toward: euros, not a head-count.

Where does that €640 come from? Usually it's the lead's expected value — how likely it is to close, multiplied by what it's worth if it does. Your CRM already holds the clues: deal size, company size, ICP fit, lifecycle stage. A lead from a 500-person company that matches your ideal customer is worth a lot more than an anonymous freelancer, and the value you send should reflect that.

Crucially, value-based bidding is not a bidding strategy you switch on. It's the quality of information you feed the strategy you already use. If you want the full picture of how it works, our complete guide to value-based bidding walks through it step by step.

A simple analogy: engine vs fuel

Think of a sports car. Smart Bidding is the engine — beautifully engineered, capable of enormous speed. Value-based bidding is the fuel you put in the tank.

Pour in cheap, watered-down fuel — "every lead is worth the same" — and even a Ferrari engine sputters. It runs, but it can't tell a motorway from a dead end, so it burns your budget chasing whatever is cheapest to find: low-intent, easy-to-acquire form-fills. Pour in clean, high-octane fuel — real euro values that separate your best leads from your worst — and the same engine suddenly knows exactly where to go.

The car was never the problem. Most accounts that "tried automation and it didn't work" had a great engine running on bad fuel.

Why tROAS and max-conversion-value only work with real values

This is where the engine-and-fuel relationship gets practical. Two of the most popular Smart Bidding strategies are built entirely around value:

• Target ROAS (tROAS) — you tell Google the return on ad spend you want, and it bids to hit it. (ROAS means revenue divided by ad spend; see our tROAS glossary entry for a plain-English definition.)
• Maximise conversion value — the engine chases the most total value it can squeeze from your budget.

Both of these strategies have the word value baked into them. And here's the catch: if every conversion you send is worth the same flat number, these strategies have nothing real to optimise toward. "Maximise value" just collapses back into "get more leads" — the very thing you were trying to escape.

In other words, the smartest bidding strategy Google offers is only as good as the values feeding it. The fuel makes the engine matter. Ready to turn it on properly? Our walkthrough on how to set up tROAS when you're not an ads expert covers it without the jargon.

They're two halves of one system

Here's the clean side-by-side to keep in your head:

• Smart Bidding / Advantage+ — the algorithm. Sets bids in every auction. Built and run by the ad platform. The engine.
• Value-based bidding — the value signal you feed it. Pulled from your CRM, reflecting what each lead is really worth. The fuel.

Neither does the job alone. A brilliant engine with bad fuel wastes spend on junk. Perfect values with no automation to act on them go nowhere. Put the two together and the algorithm finally chases the thing you actually care about: revenue, not raw form-fills.

FAQ

Is value-based bidding the same as Smart Bidding?

No. Smart Bidding is Google's automated bidding engine — the algorithm that sets your bids in every auction. Value-based bidding is the practice of feeding that engine the real euro value of each lead so it can optimise for revenue instead of raw form-fills. One is the engine; the other is the fuel you put in it.

Do I need value-based bidding if I already use Smart Bidding?

If you want the algorithm to chase revenue rather than lead count, yes. Smart Bidding can only optimise toward whatever signal it receives. If every conversion looks identical, it treats a €40 tire-kicker the same as a €5,000 deal. Sending real values is what lets a strategy like target ROAS actually work.

Does Meta have value-based bidding too?

Yes. Meta's Advantage+ and its value optimisation work the same way as Google's Smart Bidding — an automated engine that needs a value signal. The names differ across Google, Meta, LinkedIn and TikTok, but the principle is identical: the engine is only as smart as the values you feed it.

Where do the lead values come from?

From your CRM. A lead's value is usually its expected value — how likely it is to close, multiplied by what it's worth if it does. PipeValue reads those values from your CRM and sends them to each ad platform automatically, so the bidding engine always has real numbers to work with.