What are the advantages of using this website

I am not really sure why I would want to use this versus just going to the website instead? I mean it looks cool. And if I didn't have a computer I would use this but don't you need a computer to use this? I mean I am not sure what the advantages are here. If it's security then I guess I could use this but I have antivirus stuff that I thought did that for me. So I am just asking this question who would want to use this website and why?