If you need it for e-commerce, it's the best platform I've used by far. If you need to learn sth about it, I suggest you look through some guides and reviews, it's usually not that easy to learn it on your own. Moreover, if you're willing to create your own business online in e-commerce, I mean, if you wanna create an e-shop, Magento is the best. However, it may be really hard in exploitation, especially if you're just a beginner. Considering the fact that you're asking what it even means, you're a newbie in this. I may suggest you check this article on amasty.com helping you to install it correctly. Hope you'll like it and enjoy your e-shop!