In the development of a professional website, two teams are commonly confused, the backend and border equipment are responsible for creating your functional and beautiful website, there is where these activities enter, Backend on the one hand In charge of Logica, that all work is the internal system of your website or your system.
On the other hand Fronnd is responsible for what you will end up seeing, styles, colorful menus, although sometimes developers end up covering both specialization in each branch, since both work for totally different things.
The fronnd is the colorful part. The interfaces. Everything that sees your eyes when navigating a website is the way in which the model of your website is built, and that is where a marked language called HTML and CSS is used.
If you arrive to listen to someone who tells you that he will program in HTML, doubt about his word