Mistakes in Facebook & Google Ads would not or rarely exist if the foundations are well tightened because running Facebook and Google Ads should feel like a predictable growth engine, not a gamble.
Yet, as I have conducted an audit on many different ad accounts for brands based in the UK and across different industries, one thing is very obvious: brands do not cease to have successful paid advertising efforts because these advertising platforms do not function; rather, they cease to have successful advertising efforts because they make a series of small mistakes in Facebook & Google Ads.
These mistakes quietly train algorithms the wrong way, inflate costs, and distort performance data until scaling feels impossible.
Below, I’ll break down the 5 most common Facebook Ads mistakes and Google Ads issues I see when auditing campaigns, as well as the way to resolve them if you want consistent results in your advertising campaigns instead of just temporary advertising spikes.
1. Choosing the Wrong Objective or Conversion Event
Running ads with objectives like Traffic or Reach when the real goal is sales, or optimising for Page Views instead of Purchases, essentially teaches the Facebook algorithm to pursue the wrong objective.
Similarly, the same applies to Google Ads, especially if campaigns are optimised for clicks without strong conversion data backing them.
When platforms optimise for the wrong signal, you attract the wrong people and your money disappears in a flash!
How to fix it
- Match Each Campaign Objective Directly to the Business Goal
- Optimise for the lowest meaningful conversion event you can support with data
- Avoid scaling the use of conversion-based bidding until tracking becomes better.
- As UK CPCs go up every year, the need for optimisation accuracy increases.
2. Wasting Budget on Poor-Performing Products or Keywords
One of the most common mistakes people make with Google Ads is the continued funding of campaigns that aren’t converting. This usually shows up as:
- Keywords that generate clicks with zero leads or sales
- Products are being advertised simply because they exist, not because of their sales records
- Campaigns that are sustained on the basis of hope but not on the basis of data.
How to fix it
- Pause or reduce spend on consistently underperforming products and keywords
- Reallocate budget to outstanding performers
- Regularly reviewing the reports of the search terms used to reduce the waste of resources
- Ad revenue rewards decisiveness. Data must always trump sentiment.
3. Poor Ad Quality and Weak Creative
No amount of targeting can save weak creative. On Facebook, this often looks like:
- Generic copy that blends into the feed
- Ads that are overly promotional with no clear value
- Creatives running long past their effective lifespan
On Google Ads, poor relevance results in low Quality Scores, increased CPCs, and decreased visibility.
The Fix
- Align ad messaging tightly with user intent
- Ensure keyword → ad → landing page consistency
- Refresh Meta creatives regularly to avoid fatigue
For Google Shopping campaigns:
- Use high-quality product imagery
- Maximise product titles with relevant keywords
- Apply correct categorization to Google product categories
Better ads don’t just convert more; they actively lower your costs
4. Inaccurate or Incomplete Tracking
If tracking is not properly set up, every decision you make is based on guesswork. Common problems include:
- Missing Out on Meta Pixel, Google Tags
- Tracking surface-level actions only
- Inconsistent attribution setups
This often leads to scaling the wrong campaigns and killing the right ones.
The Fix
- Track all key actions: purchases, forms, leads
- Validate events using Meta Events Manager and Google Tag Assistant
- Ensure that your setup conforms to UK-GDPR and consent requirements
Clean data is the foundation of profitable paid ads.
5. Overspending on Branded Keywords
Branded search campaigns usually have a high conversion rate, but many advertisers overspend on them. This is because branded users already know you; these campaigns should:
- Cost less per click
- Convert more easily
- Deliver higher ROAS
Treating them in a similar fashion to unbranded campaigns can lead to a waste of budget
Fixing this would require you to:
- Distinguish between branded and non-branded campaigns
- Apply even tighter ROAS or CPA controls on branded traffic
- Monitor impression share to Avoid Unnecessary Overspend
Branded ads should protect the demand, not exhaust your entire budget.
Paid ads appear to be random only if the basics have not been properly set up.
When objectives are aligned, tracking is clean, budgets are intentional, and creative is built around real user intent, Facebook and Google Ads become less about experimentation and more about controlled growth.
If your campaigns are looking inconsistent, costly, or hard to scale, it’s not too often a stage issue; it’s likely an indicator that your account requires tightening before more money pours in.
That’s where clarity beats spending – every time.
Want a Clearer View of What’s Holding Your Ads Back?
Paid Ads Audit
If you’re unsure where performance is leaking, a structured audit will surface what’s broken, what’s holding you back, and what to fix first, prior to increasing spend.
Paid Ads Management
Ongoing performance-led management means that for brands ready to stop testing blindly and start scaling intentionally, every campaign is accountable, every keyword is accountable, and every creative is accountable.
Strategy Consultation
If you want clarity before committing to ads or scaling budgets, a focused consultation will plot the smartest next move based on your goals, data, and market position. Paid ads work best when decisions are deliberate rather than reactive.
