What's the biggest marketing mistake SaaS Website owners make?

Lately, I’ve been reviewing numerous SaaS websites for outreach and link opportunities, and one thing I've noticed is that many of them focus heavily on features rather than the actual problem they solve.

The homepage usually lists 10–15 features, but it’s still not clear who the product is really for or why someone should choose it over others.

A few times, I even had to scroll a lot just to understand what the tool actually does.

I’m curious from a marketing perspective, what’s the biggest mistake you see SaaS website owners making when trying to market their product?