How important are Mementos?
I am 25 hour-ish onto the game and so far loving it. Before Madarame's castle I was introduced to Mementos, but I don't understand what's the deal with them? Do I need to go once in a while to see what I find? Or to fight with the shadows there? Or just when I am given quests to go?
Also I reached level 19 but I feel I should have been a higher level when fighting Madarame's boss bc it was kinda difficult fight. How can I reach higher levels? Should I fight every shadow I encounter?
I am a newbie in Persona and jrpg games so please be gentle 😭 I am following some guides too for the confidants and in some parts of the story in case I miss something