Honestly, it all comes down to what you're promoting and how well you blend them.
For physical products, AI-generated images can be a credibility killer. People can spot weird hands, reflections, and textures from a mile away. Stick that next to a "buy now" button and it screams spam. For software, abstract concepts, or lifestyle shots that are clearly illustrative, they tend to work fine - just don't pass them off as the real product.
What I've seen work well:
- Always use real product photos near any call-to-action
- Use AI for hero banners, background images, or "person using the tool" illustrations
- Label them clearly - e.g., "illustration for demonstration purposes" - removes the deception factor
From an SEO perspective, Google cares about relevance, proper file names, alt text, and load speed - not whether it's AI or stock. UX is similar: fast-loading, on-brand visuals help retention and engagement. Janky images hurt bounce rates just as much as broken forms do.
If you want solid data, run a simple A/B test. One post with standard screenshots, another with a mix of real and AI-enhanced images. Check click-through and time on page in GA. That'll give you a real answer instead of guesswork.