The internet contains websites and connects us together. CSS and HTML are the special web languages that make up the internet. They work together to form a website, especially the front-end design. CSS and HTML work together to affect the content, style, and interactivity of a website.  

CSS simply means cascading style sheets, and CSS3 is the third version and the latest release. It defines the web page content. CSS3 relies on the principles of selectors, styles, and the cascade from the earliest versions of CSS and offers many new features, which include new pseudo-classes, selectors, and properties that make it easier to set up website layout. 

HTML5 is the highest version of HTML, which stands for HyperText Markup language. It is not a scripting language but rather a markup language. HTML5 provides the best display on the web page content, improves support for web-based applications and media, allows a more complex type of content, and increases the interoperability of HTML-documents. HTML5 offers new features that make pages more explicit and enables search engines and screen readers to navigate pages easily, thereby enhancing the web experience for users. Also, HTML5 offers an application programming interface for storing data offline, dropping and dragging as well as drawing graphics on the screen. HTML5 has revolutionized how developers build website mark up content. 

Usually, a graphic marketing agency relies on both CSS3 and HTML5 to build a website, while bloggers also use both to create blog pages that are semantic and amazing. With the new features introduced in both CSS3 and HTML5 web languages, websites are a lot easier to build. To use CSS3 and HTML5 to build a website, the following can be applied. 

No self-closing tags: In older versions of HTML, there are elements called self-closing. These ends with a forward slash before greater than sign to show that you don't need to add another closing tag elsewhere.