Google Ads specialist vs generalist: when specialisation actually pays

The standard advice when hiring someone to run Google Ads is "get a specialist". That advice is half right. A Google Ads specialist costs more per hour than a digital marketing generalist. Their scope is narrower. For some accounts that trade-off pays back many times over; for others it doesn't. Knowing which camp you're in matters more than the default answer.

Here's how we think about it, from having hired both, been both, and audited plenty of accounts run by each.

What a Google Ads specialist actually knows that a generalist doesn't

On the surface, both can run Google Ads. The difference shows up when the account gets complicated.

Match-type behaviour over time. Google Ads match types have changed materially three times since 2019. A specialist has lived through each change, watched how their accounts behaved, and built intuition for what works now. A generalist has read a blog post about it.

Bidding-algorithm state transitions. When a Target CPA campaign starts thrashing. When a Performance Max campaign is under-spending and how to diagnose whether it's a creative problem, a feed problem, or a conversion-signal problem. A specialist has felt this happen and knows the patterns. A generalist will read the Google help docs and guess.

Conversion tracking edge cases. Enhanced Conversions for Leads, offline sales import, consent-mode v2, value-based rules, cross-domain tracking with GA4. These are interconnected and if you get one wrong the whole account is downstream broken. A specialist has debugged these live; a generalist will set them up from a tutorial.

Auction-specific dynamics. Why B2B SaaS keywords in the UK behave differently from B2C e-commerce in the US. Why brand defense spend is worth it in some categories and wasted in others. How the auction has behaved historically in your specific industry. A specialist will have worked in your category or an adjacent one; a generalist won't.

When to break Google's best practices. Every Google best-practice document tells you to do five things that make Google money and two things that make you money. A specialist knows the difference and when to ignore the official advice. A generalist follows the docs, because that's all they've got.

What a generalist offers that a specialist usually doesn't

Before the conclusion looks obvious, the honest case for the generalist.

Context across channels. A generalist sees what Meta is doing, what LinkedIn is doing, what organic is doing, and can rebalance across channels. A Google Ads specialist optimises within the channel whether or not the channel is the right place for the next pound.

Integration with other marketing work. A generalist can connect the Google Ads brief with the email campaign, the landing page, the social creative. A specialist needs to be briefed on each, and the coordination work has to happen somewhere.

Budget scale. A specialist usually isn't worth hiring for an account under £3k/month spend. The fee will eat a big chunk of the budget. A generalist who handles Google Ads alongside other channels can be more cost-efficient at that scale because the salary is amortised across several responsibilities.

Strategic flexibility. If the business decides next quarter that Google Ads isn't where the growth is coming from, a generalist pivots. A specialist either pivots too (in which case why did you hire a specialist) or walks away.

The threshold where specialists start paying back

The fair answer: it depends on spend and complexity.

Below £3k/month, or a single straightforward campaign type. A generalist who treats Google Ads as one of four channels is usually fine. The structural risk is bounded by the spend. A specialist's fee would eat too much of the account.

£3k–£10k/month, or mixed campaign types (Search + Shopping, Search + Performance Max). This is the crossover zone. A good generalist can still run it; a specialist will do it noticeably better. The question is whether "noticeably better" at this spend justifies the premium. Rough rule: if you're in a sector with expensive clicks (finance, legal, B2B SaaS, high-ticket e-commerce), go specialist earlier.

£10k+/month, or complex campaign architecture (lots of products, international, feed-driven, multi-stage funnel). Specialist, no question. The structural decisions at this spend compound too hard for a generalist to get right. The fee differential becomes a rounding error against the performance differential.

£25k+/month, multi-market. Team of specialists, probably, not an individual.

Specialism within specialism

A further wrinkle: "Google Ads specialist" is itself a broad title and has sub-specialisms.

• Search specialists — B2B lead-gen, informational queries, intent-heavy
• Shopping / feed specialists — e-commerce, catalog-driven, Merchant Center management
• Performance Max specialists — automated-campaign management, asset-feed design, audience-signal strategy
• App install specialists — mobile UAC campaigns, App Campaigns, in-app event tracking

Within UK/European B2B SaaS, for example, a Search specialist who understands intent-matching and enterprise sales cycles will outperform a Performance Max specialist who's built their career on catalog-driven e-commerce. When hiring, ask about the flavour of specialism, not just the title.

The question nobody asks but should

If you're already working with a specialist and wondering whether you have the right one, the most useful question is not about Google Ads at all:

"Describe a business decision our company made in the last quarter that changed how you ran the account."

A real specialist has one. They noticed the product pivot, the pricing change, the target-segment shift, and adjusted the campaigns to track the change. If they can't name one — if the account is running the same way it was six months ago regardless of what's happening in the business — they're running the platform, not the channel. That's the tell.

What we do

We're Google Ads specialists. We don't run Meta. We don't write email sequences. We don't touch SEO on your behalf. We run Google Ads and Microsoft Ads, as well as tracking and attribution work that keeps those two channels optimisable. If that's the shape of the problem you have, book a free audit. If you need a generalist, we'll tell you and point you to someone good — no retainer fits every business.