How to effectively use map

I am a midlaner and I need help understanding how to use my map more effectively. Currently I feel myself looking at the map frequently, but never taking any information from it, and I feel like that is from a lack of understanding on how to effectively read the map. For example what information would I actually be looking for and what I should do with said information? I notice the basics (E.g. If I see the jungler on a ward for a split second, I can usually work out where they are going) but I feel like its not enough. I mostly just feel like I need help understanding the information that the map provides. Thanks in advance!

If it helps, I primarily play mages (Viktor, Vladimir, Veigar) yes they all start with V, but I promise this is a coincidence xd