Vision Score under "Advanced Details"

Nobody knows exactly how it's calculated, but it takes things like duration of your wards before being cleared / expired, enemies seen, location, wards you've cleared, amount of wards used / pinks purchased all into account to come up with a score. The number sort of represents how well you did at vision control as a whole. There's no cap to the system. If you had a game that went on forever, you could increase your vision score forever.

Support Main here, I check the vision score often, noticed a few things:

1.) It's not about how many wards you drop. Someone who drops less wards can have a higher vision score.

2.) How many wards you clear factors into it. Infact, just about any form of 'Vision Denial' seems to factor into it.

3.) You don't seem to get as much or anything for placing a ward where there is already vision, so trying to supplement your score by dropping wards in bad locations does not seem to help.

4.) I think the majority of the score is based on how much 'dark map' you clear over the course of the game.