Setting up websites for marketing companies. What degree is this called?

I would like to create websites, set up e-commerce sites, and do search engine optimization for professional companies. Which Master’s degree should I shoot for?;

Web development, software engineering, web development? Is there a specific degree that you would recommend?

NOTE: I want no part of doing sales or having a quota for these companies. I strictly want to create websites

Software Engineering or CS.

Some Information Systems or Information Technology programs have web development tracks. Less theoretical than CS will be.

Do you really need a master’s degree to do this kind of work?

I want the degree with the least amount of mathematics and physics classes. Therefore, I think cs is out? So would an information systems or an IT degree with a concentration in web development be better? Do they have a master’s is soley web development?