Why use go:title etc...

I've just seen this in the meta data of a website:
<meta property="og:title" content="foobar...
There's loads of them… go:description… go:audio… go:keywords… and so on
Apparently it's to do with open graph and Facebook which I don't fully understand, but why use it and what are the advantages? I've googled it, but I'm finding little ore than what I already mentioned. Just wondering if anybody here knew a little more detail than the info I've found.
Thanks.
Mat

From this page - Facebook Content Sharing Best Practices
I read:
Use proper Open Graph tags
Open Graph tags are included in your page’s HTML and allow the Facebook Crawler to generate previews when your content is shared on Facebook.
We give examples below, but the basic Open Graph tags you should implement are:
og:title – The title of your article, excluding any branding.
og:site_name - The name of your website. Not the URL, but the name. (i.e. "IMDb" not "imdb.com".)
og:url – This URL serves as the unique identifier for your post. It should match your canonical URL used for SEO, and it should not include any session variables, user identifying parameters, or counters. If you use this improperly, likes and shares will not be aggregated for this URL and will be spread across all of the variations of the URL.
og:description – A detailed description of the piece of content, usually between 2 and 4 sentences. This tag is technically optional, but can improve the rate at which links are read and shared.
etc.

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ANOKNUSA wrote:
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Hey all.
Each time i'm using a title (x secs), i'm crashing during the rendering...
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Hi F1RAAZ,
F1RAAZ wrote:
Each time i'm using a title (x secs), i'm crashing during the rendering...
Sorry, I'm not seeing that with my system. Can we please get more info on your system, media, OS, etc.?
FAQ: What information should I provide when asking a question on this forum?
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Why use go:title etc...

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