Why is it important to learn HTML when designing websites ?

Every website is based on HTML. That means if you want to make a website you need to know html. Of course you can just put the html , head and body tags and just write text in the body but than your website will be with only text and very boring. HTML is used in every aspect of the webpage. For example the layout , pictures, background, link . Everything. so its very important to know it especially if you plan on designing websites in the future , or if you are like me and want to know every single thing about computers :)