Proficient in Photoshop and Illustrator (graphic design related).
They are familiar with color theory, typography, image editing and photography.
HTML and CSS coding are also part of their repertoire, so that the site works well technically.
UX design is their main weapon: their basic task is to increase the user experience so that the target audience can find solutions to their problems on the client's web interfaces.
He knows and understands content and technical SEO, so that the client's product or service is featured prominently in the search results.
He also understands analytical softwares that can monitor the performance of the finished website.