What is wrong with the screen of my phone? And what do I need for it?

It fell from my hands to the floor as the screen was facing downwards. Then its screen went complete black. But it still accepts finger touches. Like I can unlock my phone (it has a slide lock), answer a call etc. Because I approximately know where to touch and slide to perform those operations. Also, there’s a little cracked scratch line on the screen, and the whole screen looks like it’s kind of wet when I put it under light. Now I want to buy the screen needed online. But I’m a little bit confused what exactly is needed, and so I don’t want to pay for a wrong phone part. So I decided to ask for help to figure it out. I did a little bit of research and this is what I found:

https://www.ebay.com/itm/Pantalla-Para-S...

Is that what I really need for my phone?