[cschifani]

If I'm looking at a game in Mesen's PPU Viewer and it tells me that, for a given tile, "$2000 = $5F" or "$2000 = $10," what does this tell me about the game? I've never done anything with ROM hacking before, so I'm trying to figure some things out. Thank you for any information you may provide.

[nesrocks]

It tells you that at that specific moment in time that address has that tile loaded in it.

If you select "CHR viewer" you'll see both currently available CHR tables and you can find the tiles there by the ID you just mentioned.