What is Cloudflare and why is it showing up in my browser?

[wizrddreams]

I don't think this is necessarily the right place to be posting this.
But I am curious to see if anyone else on the forums has run into this or knows what it is.
I will attach screenshot's of the output below.
I am slightly concerned/interested as I have never seen this before.
I ran into it when I was going to do stuff on <removed>.
http://i.imgur.com/SsOuy7K.png
http://i.imgur.com/aEpPKH6.png

[sandyd]

Moved to Cafe

Cloudflare is a CDN and security gateway that some websites may use to accelerate their content and to block DDOS/other malicious attacks. The traffic passes through Cloudflare, and then to the server hosting the site content.

That particular page shows up when Cloudflare has a connectivity issue with the server that actually hosts the content.

[night_sky2]

It means the server is down.

Either because they are too many people trying to access it, or because they got hit by a DDOS attack (which is quite frequent on these types of website).

[Habitual]

I saw it on occasion when I used CF.
It's transitory and should not last long.