What is lynda.com

Lynda.com is a service that LinkedIn Premium subscribers sign into. Having recently upgraded my subscription to LinkedIn in order to talk to @cambolc followers, when lynda.com popped up unannounced. I thought, oh well it is Microsoft (I think it must be as LinkedIn is), they do like to force to people to adopt new and better technology. I was pleasantly surprised as it had looked like a way of me a contractor validating some of the skills I have without actually physically taking a day out and going on a course in a building with a person. I haven't put a link in yet to the site have not yet been given a reason to do that.