What's the Biggest Google Ads Mistake You See Beginners Make?

I've been reading a lot about Google Ads lately, and one thing I've noticed is that many beginners burn through their budget before they even have enough data to learn from.
In your opinion, what's the biggest mistake new advertisers make?
Is it targeting the wrong keywords, weak ad copy, poor landing pages, incorrect bidding strategies, or something else?
I'd love to hear what you've seen from your own campaigns. Sometimes a simple lesson from experience is worth more than hours of reading guides.

From my experience sending traffic to a weak landing page is one of the biggest mistakes Even good ads struggle when the page does not convert well

From my experience, the biggest mistake is making decisions too quickly with limited data. New advertisers often pause or change campaigns before Google has enough information to optimize. Patience and proper tracking are just as important as setup.

A common mistake is trying to optimize everything at once. Better to test one thing, analyze results and then make changes.

The thing is, Google Ads is a complex and multifaceted tool, and when starting to work with it, you need to understand and consider many nuances. Everything works together: keywords, ads, a high-quality landing page, audience selection, ad run time, and even the product itself (if it's simply not competitive).

You need to consider everything holistically. Google is too complex a tool for beginners, but it's quite effective in skilled hands