What web development skill has the highest demand from clients right now?

For freelancers and agencies offering web services which development related skill currently generating the most client demand are businesses prioritizing speed optimization custom development automation integrations or something else?

I am a website developer myself (wordpress) .
There are lots of platforms in demand like (wordpress , webflow , shopify) . The point is not to choose the CMS or skill in demand (because with each demanding skill comes high competition)

So maybe you can choose the one CMS / skill which you like the most and most comfortable with and focus on how to get the clients .

or do you have any platform where you are going to sell these skills ?

I would say maybe fixing vibe coded apps, tools since vibe coding and zero programming skills comes with bugs and errors plus security risks

From what I've seen, automation integrations are in really high demand. Businesses want websites that connect with CRMs, email platforms, payment systems, and AI tools, not just good-looking pages.
Speed optimization is still valuable too, but automation tends to solve a bigger business problem, so clients are often willing to pay more.