Visual communication, art direction. Web layouts and typography. Graphic design, interface design, user experience design, illustration, photography, artwork
What do the people who use your website actually want? Making web content accessible. Designing and testing interfaces and the systems that support them.
Search Engine Optimization is free traffic to your website or you can say a reward from google for your rich and engaging content. SEO is a magical potion hard to make. Don't worry I got the recipe.
Social Media is not an option its a must. It builds a relationship between you and your customer. I make sure that your relationship doesn't break like nowadays relationships.