I put other but to be clear on what I do. I do full scale development of the sites, plus I do all their email marketing, SEO, and paid ads (Google and Meta). You could say I'm a CMO in a way because I'm doing everything for these companies as an agency owner.
For me though SEO is the most important (why I've been critical of the AI in the past), because content based SEO (not blog based SEO) is vital to understand how the algos work. Building a site just to build a site won't help grow the site to something that Google will actively promote and work with.
When I build landing pages for clients again I make sure the copy is not SEO focused but ad-focused and very hyper laser focused to demographics.
There is a lot I do for my clients, but I wanted to share what I do to help them grow, because at the end of the day if they are not getting bookings, or contacts, then they are not making sales and that is why I do revenue based growth for these clients