SEA specialist: what they do and how to choose the right one

An SEA specialist makes sure that paid search advertising returns more than you put into it. Not by "optimising the campaign", but by getting three things right: which queries you pay for, what the visitor sees afterwards, and whether your measurement honestly tells you what an order or lead delivers. Without that third point, everything else is guesswork with a dashboard attached.

SEA stands for search engine advertising: advertising in the search results, in practice mainly Google Ads and Microsoft Advertising. Looking for the unpaid side? Read what an SEO specialist does.

What an SEA specialist actually does

The work happens on six levels, each with its own controls. Someone turning the wrong dial changes nothing — or everything at once.

A normal working week: reviewing search term reports and excluding waste, adjusting bid strategies and goals based on sufficient conversions, testing ad copy and assets, aligning landing pages with what the ad promises, shifting budget toward what demonstrably works, and improving the feed or product data for Shopping and Performance Max.

What an SEA specialist doesn't do: manually bid on keywords every day. Since Google's bid strategies started using machine learning, the role has shifted. The work now sits in what you feed the system: correct conversion values, sharp structure, exclusions, good creatives and a page that converts. A specialist who doesn't frame it that way is working from a ten-year-old playbook.

Why an SEA specialist adds value

Ads are direct, measurable and can be switched off immediately. That is the strength and the danger at once: within weeks you can neatly spend a lot of budget on traffic that will never buy.

• Stopping waste. In almost every account we take over, part of the budget goes to search terms with no buying intent, or to products with too little margin. That's profit you gain without spending an extra cent.
• Steering on margin instead of revenue. Once gross profit is part of the measurement, campaigns get optimised differently. That's usually the biggest leap a specialist makes.
• Learning faster than organic. SEA tells you within weeks which message and which query make money. That's directly useful for your website and your SEO.
• Scaling without guesswork. Once you know what an order is allowed to cost, growing becomes a choice instead of a risk.

The core calculation behind every decision

There's one number you have to supply yourself that a specialist can never invent: the maximum a lead or order is allowed to cost you. That's gross margin per order, multiplied by the chance a lead becomes a customer. Without that ceiling, every report stays an observation. KPIs and targets explains how to set that ceiling; measurement explains how to make sure the figures behind it are correct.

What a good SEA process looks like

Pay particular attention to the first phase. A specialist who starts with bidding and ad copy without first checking whether conversions are double-counted or values are correct is optimising toward the wrong goal. That costs money faster than a poor ad headline.

Also account for your own volume. With few conversions per week, every reliable conclusion takes longer — that's statistics, not a matter of working harder. See A/B testing and significance for the same rules applied elsewhere.

What knowledge an SEA specialist really needs

Want to go deeper into the mechanics behind Google Ads? See Google Ads and SEA advertising.

The questions to ask before you hire someone

1. "What do you check in the first week?" Expect: conversion tracking, values, double-counting, search terms, structure. Not: "I'll set up new campaigns."
2. "What is an order allowed to cost us, and how do you get there?" A good specialist asks about your margin and works backwards. Anyone naming a ROAS target without knowing your margin is guessing.
3. "When do you say we should stop a campaign?" There should be a threshold, expressed in money and time.
4. "What changes on our website?" Something should change. Otherwise only the account gets optimised, not the conversion.
5. "Whose name is the account under?" Answer: yours. Always. Including historical data and conversion configuration.

Warning signs: a fee as a fixed percentage of media budget with no agreements on results, no access to your own Ads account, reports based only on clicks and CTR, and "raising the quality score" as a goal in itself.

What an SEA specialist costs

There are no reliable national rate cards, so this is what we see in the market rather than a norm. As an employee, an SEA specialist grows with experience from an execution-focused level to someone who combines structure, feeds and margin; that latter group is scarce. Freelance and interim rates run higher per hour than a permanent role — you're paying for speed without recruitment risk.

More important than the rate is the ratio to your media budget. Below a few thousand euros a month in ad spend, a full-time specialist rarely adds up; a fixed day a month plus good measurement is often more sensible. Above that level it flips: too little attention then costs more than the specialist does. We advise against a fee as a fixed percentage of media budget — that puts the incentive on spending more rather than delivering more.

How we help: in-house people, freelance and interim

• Our own team. We handle SEA together with the landing pages and the measurement. That's exactly the combination a standalone specialist usually has to wait on.
• A freelance SEA specialist. For a defined assignment or fixed days a week, with us as backup for technique and content.
• An interim specialist. When a role needs to be covered temporarily and also needs direction.
• Strengthening your own people. If you already have someone in-house, coaching is often more effective than outsourcing: working through the account together, working through the calculation together, and then continuing on your own.

Accounts, data and delivered work always belong to you, and we document the way of working so it keeps functioning without us.

Where SEA usually goes wrong

• The measurement can't be trusted. Double-counted conversions or missing values make every optimisation directionless.
• Everything on revenue, nothing on margin. A ROAS of 6 can be loss-making and a ROAS of 2 healthy. Without margin, you don't know which one you have.
• The landing page doesn't do its job. Buying traffic to a page that doesn't deliver on the promise is the most expensive mistake in the channel. See CRO and A/B testing in checkout.
• Too many campaigns, too little data. Fragmentation means no single campaign gets enough conversions to learn from.

Want to know where it's leaking for you? Request a strategy call or start with the website scan.

Sources

• Google Ads Help: about Smart Bidding — what automated bidding needs to work.
• Google Ads Help: search terms report — where you see what you're really paying for.
• Google Ads Help: tracking conversions — the foundation every target rests on.
• Microsoft Advertising Help — for the second search network in the Benelux.