The hippocampus is crucial for encoding certain novel, associated, emotionally relevant, or repeated perceptions into long-term memory.

“So this hippocampus does something with all of these perceptions that are coming at us every single day, every minute of the day, and not for all of them, but for some of them that have these features that we just talked about, maybe they're novel, maybe they have associations, maybe they're emotionally relevant, maybe they've been repeated, some of those things in the realm of facts or events get encoded in our long-term memory.”