Why am I seeing "plan your voting day strategy" so often?
As a non-American, I don't know exactly how your polling works, but why am I seeing "plan your voting day" or "set a voting strategy" like they've done on the Cards Against Humanity voting campaign?
Where I live, it's just show up on voting day and cast your ballot, or ask for a mail in ballot, or go to a special voting station if you need (or want) to vote early. Is it the same in the US, and this is just getting people to gather those last pieces of information early and put a reminder in the calendar? Or is there more to it than that?
The US has had a long history of restricting who gets to vote. Originally it was only white land owning males, then it has gradually progressed into what it is today. Some states are cool with who gets to vote, others are still upset there are certain groups of people who get to vote who they wish didn't (and actively work towards restricting or removing their rights), so those upset states constantly create as many barriers as possible to disenfranchise groups of voters they don't like. If you'd like to see how awful it has been before, I suggest reading about Jim Crow laws.