Some people might assume it's an organisation founded by VSOs for the purpose of hoovering up government training (and other) grants in exchange for a figleaf of outsourced and outdated training and five free goes on their "specialised" employment agency web page.
But I'm not going to do that because I'm not a cynic.
This whole area is a massive minefield of training companies that will take your money - 4 figures sometimes - and offer very little of value in return, both in terms of knowledge and in certificates that aren't recognised by anyone. That's why I linked to the official Google training site above - anything delivered directly by one of the big players - Google, Microsoft, Amazon, Cisco etc - and leading to one of their own certifications is probably a safe bet. There are a few niche players who are respected but you won't know about them until you're in the industry already. Basically be very careful who you give any money to.