Hiring a facebook ads agency feels like the obvious move when your paid social isn't working. But for most SMEs, the problem isn't which agency they choose — it's whether an agency model is the right structure for their budget and their goals in the first place.
This article breaks down what a facebook ads agency actually does, where the model works well, and why many SMEs are quietly shifting their Google Ads management to an AI agent instead.
What a Facebook Ads Agency Actually Does
A facebook ads agency manages paid social campaigns on Meta's advertising network — primarily Facebook and Instagram. The work typically includes audience research, creative direction, ad copywriting, campaign setup, bid management, and monthly reporting.
On paper, it sounds thorough. In practice, what you get depends heavily on the size of the agency, the experience of the account manager assigned to you, and how much of your monthly retainer actually goes toward active management versus overhead.
After nine years running a marketing agency, we saw this pattern repeatedly. A client would sign with a facebook ads agency expecting senior attention, then discover their account was being managed by a junior who was also handling fifteen other clients. The reporting looked polished. The actual optimisation was thin.
That isn't an indictment of every agency — good ones exist. But it is a structural reality worth understanding before you commit to a retainer.
Facebook Ads Agency vs Google Ads: Different Channels, Different Logic
One thing that gets conflated constantly is paid social and paid search. A facebook ads agency operates in an interruption-based environment. Users aren't searching for anything — they're scrolling, and your ad interrupts that. Success depends on creative quality, audience targeting, and frequency management.
Google Ads is intent-based. Someone types a search query because they want something. That fundamental difference changes everything: the bidding logic, the keyword structure, the match types, the conversion tracking, the quality score mechanics. Understanding how Google Ads actually works before comparing it to Facebook is essential, because the two channels reward very different skills.
Many SMEs run both channels simultaneously, which raises a practical question: do you need two separate agencies, one for each channel? Or is there a more efficient way to manage at least one of them?
For Google Ads specifically, that question has a cleaner answer now than it did a few years ago.
What SMEs Actually Spend on Paid Advertising
Before deciding between a facebook ads agency, a Google Ads agency, or an AI agent, it helps to understand the typical cost structure. Agency fees vary significantly by market and scope.
| Management Option | Typical Monthly Fee | Ad Spend Minimum | Contract Length |
|---|---|---|---|
| Facebook Ads Agency | £800 – £3,000 | Often £1,500+ | 3–6 months typical |
| Google Ads Agency | £500 – £2,500 | Often £1,000+ | 3–6 months typical |
| Freelance PPC Specialist | £400 – £1,200 | Flexible | Month-to-month |
| AI Agent (Google Ads) | £99 – £299 | Flexible | No contract |
These are indicative ranges, not guarantees. For a deeper breakdown of what Google Ads management actually costs, this guide on Google Ads price per month covers the variables in detail. The comparison above is useful context when a facebook ads agency quotes you a retainer and you're trying to sense-check whether the fee structure makes sense for your scale.
When a Facebook Ads Agency Is Worth It
There are genuine use cases where hiring a facebook ads agency makes sense. If your business relies heavily on brand awareness, if you're selling visually led products, or if your customer acquisition model depends on interrupting cold audiences with compelling creative, then paid social managed by experienced specialists can deliver strong returns.
The agency model also suits businesses that lack internal creative resource. A good facebook ads agency brings copywriters, designers, and audience strategists together in a way that a single freelancer or an AI agent cannot replicate for creative production.
Where agencies struggle is on the operational side: day-to-day bid adjustments, pausing underperforming ad sets, reallocating budget mid-flight based on performance data. These tasks require consistent attention, and most agencies batch them into weekly or fortnightly reviews. By the time an underperformer is paused, it has already consumed budget it shouldn't have.
This is less a criticism and more an honest account of how agency workflows function at scale. If you want to understand the trade-offs more broadly, this piece on marketing agency for small business covers the structural limitations in plain terms.
How Google Ads Management Works Differently
Google Ads management involves a different discipline to Facebook. The core tasks are keyword management, bid strategy, match type hygiene, negative keyword lists, quality score monitoring, ad copy testing, and budget pacing. These are largely analytical and operational tasks rather than creative ones.
Because the work is more structured and data-driven, it's more amenable to automation. Not crude automation — the kind where rules fire blindly — but intelligent automation that reads account performance, identifies patterns, and acts on them with the kind of judgment an experienced account manager would apply.
Overtime is an AI agent built specifically for Google Ads management for SMEs. It logs into your Google Ads account, adjusts bids based on performance data, pauses ads that aren't converting, reallocates budget toward what's working, and sends clear summaries so you always know what's happening and why.
This matters particularly for SMEs who are already paying a facebook ads agency for paid social and don't want to add a second agency retainer just to manage search. Having an AI agent handle Google Ads separately — at a fraction of agency cost — keeps the two channels clean without doubling the overhead.
What Doesn't Work: Honest Trade-offs
An AI agent managing Google Ads is not a substitute for a facebook ads agency managing Facebook. The channels are different. The creative requirements are different. If your primary growth channel is paid social and you need strong creative strategy and audience development, an AI agent won't replace that.
Similarly, if your Google Ads account is genuinely complex — multiple international markets, sophisticated bid strategies across hundreds of product categories, deep attribution modelling — you may need a specialist human in the loop, at least initially. This comparison of AI-powered PPC management for small businesses is worth reading if you're uncertain whether your account sits in that more complex bracket.
The honest position is this: most SME Google Ads accounts are not that complex. They have too many keywords, some underperforming campaigns that haven't been paused, and bids that haven't been touched in weeks. An AI agent handles that well. A full agency retainer for the same account is often overkill.
For a direct comparison of approaches, this guide on the best PPC agency or AI agent for SMEs goes through the decision in more detail.
Making the Decision in 2026
The advertising landscape in 2026 gives SMEs more options than they've ever had, and more confusion to go with it. A facebook ads agency pitching you on Meta performance is not wrong to do so — Facebook and Instagram remain significant channels for certain business types. But that pitch should not automatically extend to your Google Ads account.
Split the decision deliberately. Evaluate your paid social and paid search needs separately. Ask what each channel actually requires in terms of management activity, and whether the structure you're being sold — whether agency, freelancer, or AI agent — actually matches that requirement.
Pricing for Overtime's Google Ads management is structured to make this split practical for SMEs who are already spending on a facebook ads agency and need Google Ads handled without a second large retainer.
If you're comparing options more broadly, this article on ecommerce PPC services covers agency versus AI across both channels for product-based businesses specifically.
The most important thing is not to let a facebook ads agency manage your Google Ads by default because it's convenient. The skills don't transfer the way you'd hope, and the results usually show it within the first quarter.
If your Google Ads account needs consistent daily attention — bid adjustments, budget reallocation, pausing what isn't working — Overtime's Google Ads AI agent does exactly that, without a long-term contract or agency-level fees. Start by connecting your account and letting it run an audit. You'll have a clear picture of what's being missed within 24 hours.
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Frequently Asked Questions
What does a facebook ads agency actually manage?
A facebook ads agency manages paid campaigns across Meta's network, including Facebook and Instagram. The work covers audience targeting, creative development, campaign structure, bid management, and performance reporting. The quality of that management varies significantly by agency size and the experience of the individual account manager assigned to your account.
How is Google Ads different from Facebook Ads management?
Google Ads operates on search intent — users are actively looking for something when they see your ad. Facebook Ads operate on interruption — users are shown ads based on demographic and behavioural targeting while browsing. The management skills required are substantially different, which is why the two channels are typically handled separately.
Should I use the same agency for Facebook and Google Ads?
Not necessarily. Many agencies offer both services, but the skill sets are distinct. Paid social specialists and paid search specialists rarely overlap significantly. Using the same agency for convenience can result in weaker performance on one or both channels. For Google Ads specifically, an AI agent is often more consistent and more cost-effective than adding it as a secondary service at a multi-channel agency.
Can an AI agent replace a facebook ads agency?
No. An AI agent managing Google Ads is not a substitute for a facebook ads agency managing Meta campaigns. The creative demands of paid social — audience strategy, copywriting, visual creative — require human input that an AI agent is not designed to replace. Where an AI agent adds value is in the operational management of Google Ads: bids, budgets, keyword hygiene, and performance monitoring.
How much does a facebook ads agency typically charge?
For more on this, see our guide: Facebook Marketing Agency or Google Ads AI Agent.
Most facebook ads agencies charge between £800 and £3,000 per month in management fees, often with a minimum ad spend requirement on top. Contracts are typically three to six months. Some agencies charge a percentage of ad spend rather than a flat fee, which can become expensive quickly as budgets grow.