Ask HN: What do you hire an agency or freelancer for?

I'm trying to get a feel for which kind of project work exists in tech.

Rather than taking on full-time freelance roles, I would rather do project-based work.

I see people building websites, I see people building automations, I hear people doing performance optimisations, people building mobile apps ...

What other work do you hire a tech freelancer or agency for?

Many Thanks!