Finally, the front page to the internet. OK, so that doesn't explain much. Basically, you find something online you want to share with others, you click on the funny little alien head. You input a title to explain your find, along with additional text, and there you go: you've shared a bit of your life with the world. Reddit has a rating system (upvotes, downvotes) to control how interesting and relevant your link is to the community, and the most interesting, funny, or touching links usually makes it to its coveted "front page" (the first page you see when you visit the site). Because of the various "sub-reddits" available on the site, you can register a screenname for yourself and start personalizing what information you want to see on your front page (i. E. If you're a fan of jazz music, http://www.reddit.com/r/jazz has posts of jazz-related finds).
This site is notorious for having a massive following and a simplistic design, making it easy to use. Commenting on others links allows you to give your opinion on the post or ask questions. You don't even have to post a link to an image or video to ask a question, search for help, or contact other users. After a few days of trying it out, I'm sure you will be as hooked as I was because there is so much original content floating around on the site that it keeps you coming back.