Pardon me if somebody's already mentioned this.

In SL, in the profile, there is a section called "Notes" in which I can jot down things about the individual. Those notes are only visible to me.

I use this feature all the time.

I jot down the date and location of where we first met with tidbits about the individual. I may jot down the date and location of subsequent meetings.

I meet so many people, I forget who's who. However, Notes allows me to "remember" who people are. If I run into somebody, one of the first things I do is open their profile and look at Notes. If blank, we've never met. Otherwise, I may discover things.

All the best. Primfeed is a great platform. Kudos.