Kind of a broad question. I wonder why people take notes - Is it for studies or learning? Is it just to remember things? Is it to make your own map of your knowledge? Is it because you just want a place to vent out your feelings into the void?
What do you use to accomplish that? App? Paper? A chat room?
The act of taking down notes helps me remember things (even if I never look at the actual notes, which I rarely do!)
Handwriting has this effect moreso than typing, but typing still helps. I think having to embody the notes in some form forces me to pay attention at all, and having to keep up means I need to summarize or pick the most salient points, which means I must engage with the material further.
I tend to use pen & paper or a tablet PC. If whatever I’m taking notes for is more of a liberal-arts-lecture feel, I’ll type (more words needed!), but if there are diagrams or equations involved (STEM time!), I’ll handwrite.