The content includes all text, images, videos, etc. from a website.

The content probably has the biggest influence on a website's ranking since its decisive in how many backlinks and visitors the website gets.

The content should be up-to-date and appealing and it should offer the visitor something new.

Search engines still have difficulties recognizing what’s in images, animations, videos or audio files. So they read the page's file name or the ALT attribute of the image. That’s why important information should also be available in text form for search engines.