I think you would normally be expected to actually have some experience behind you before taking a masters in education. I suggest if you don't know what a masters is you spend some time doing some research!
It's a 12 month course if you do it full time, 2 years part time, it's classed as a postgraduate degree and you have to pay for it unless you get funding. It's alot of work, mine wasn't too taxing. It didn't make me employer friendly as it's the next step towards a PhD. It depends whether it's something you want to do.
I'm not fussed really. I just went for my second year PGCE interview and the tutor said a lot of the work is research based as it is working towards a masters (whether i chose to take that step or not is up to me). But that's all she said. I know obviously a masters is higher than a degree and is researched based, but just didn;t know what it's actually for IYKWIM.