If you run Google or Meta ads, artificial intelligence is already choosing your bids, picking your audiences and shifting your budget between placements — often without you clicking a thing. Google’s Performance Max and Meta’s Advantage+ campaigns are built around this. Here’s exactly what the AI controls, what you still decide, and how to stay in charge of your spend.
What does Google’s AI actually control in Performance Max?
Performance Max is Google’s all-in-one campaign type, running your ads across Search, Display, YouTube, Gmail, Discover and Maps from a single campaign. According to Google’s own guidance, the AI handles three big jobs on your behalf:
- Bidding: Smart Bidding sets a bid for every single auction in real time, based on how likely that particular person is to convert.
- Budget allocation: your daily budget is automatically funnelled toward whichever channel and placement is performing best that day — you don’t choose the split.
- Audience discovery: Google analyses intent and behaviour signals to find new customer segments you may never have thought to target yourself.
Performance Max will also use generative AI to combine the images, video and text you upload into new ad variations for different placements, without asking your approval on each one.
What is Meta planning — and how much of it is already live?
Meta’s Advantage+ campaigns already do a version of this today, automatically testing audiences, placements and creative combinations to find what converts. But the direction of travel is much bigger: the Wall Street Journal reported in June 2025 that Meta, under Mark Zuckerberg, is aiming for full AI-automated advertising by 2026. In the model Meta is building towards, a business would only need to supply a product image, a website URL and a budget goal — and Meta’s AI would write the ad copy, generate the imagery and video, decide who sees it, and suggest how much to spend.
That’s the plan, not yet the everyday reality for most small advertisers. But the building blocks – automated creative generation, automated targeting and budget suggestions – are already switched on inside Advantage+ campaigns right now.
Does letting the AI decide actually pay off?
There’s reasonable evidence that it can. Research firm eMarketer reported in mid-2024 that Meta’s AI-optimised Advantage+ Shopping campaigns were delivering close to 22% higher return on ad spend than the average Meta ad in the US. That’s a meaningful gap, though it’s worth remembering it’s US e-commerce data from over a year ago, not a South African or sector-specific guarantee.
The bigger practical point is that automated bidding needs data to learn from. Google is upfront that a “solid foundation of conversion data” helps Smart Bidding perform faster and better – so a brand-new campaign with a handful of leads a month will take longer to see the benefit than an established account with steady conversion volume. If you’re just starting out with paid ads, don’t expect the AI to work magic in week one.
What should you still control yourself, whichever platform you use?
Handing over the day-to-day dials doesn’t mean handing over the strategy. Whatever the platform decides minute to minute, these calls should still be yours:
- Your overall budget cap. Both platforms let you set a firm daily or monthly ceiling – don’t skip this.
- Your campaign goal. Leads, sales or website traffic are very different objectives, and the AI optimises for whichever one you tell it to chase.
- Your creative and brand guidelines. The AI recombines what you give it – if your source images, video and messaging aren’t on-brand, neither will the output be.
- Your exclusions. Negative keywords, placement exclusions and brand safety settings stop the AI spending in places that don’t suit your business.
- Your weekly check-in. “Give it a budget and walk away” is Meta’s stated ambition, not good practice for a small business watching every rand. Review results weekly, not just at month-end.
Google vs Meta: who decides what, today
| Decision | Google Performance Max | Meta Advantage+ |
|---|---|---|
| Bid amount per auction | AI (Smart Bidding) | AI |
| Audience targeting | AI, using intent signals | AI, with advertiser inputs |
| Budget split across placements | AI | AI |
| Ad creative generation | AI (from your assets) | AI (moving toward full generation by 2026) |
| Overall spend cap | You | You |
| Campaign objective | You | You |
If you’re still weighing up Google Ads against Meta Ads in the first place, our guide on Google Ads vs Facebook Ads for SA businesses covers which platform suits which kind of business before you even get to the automation question. And if you haven’t automated anything else in your marketing yet, our piece on marketing automation for SA small businesses is a good place to start.
The honest takeaway: AI is already doing more of the moment-to-moment work in your ad accounts than most business owners realise. That’s not a reason to switch it off – it’s a reason to make sure the guardrails you do control are set properly before you let it loose on your budget.