Whats the new feature with the row of profile photos at the top of the page?

@Nuno by interacted with is that like I have commented on one of their posts? Reacted to a comment of theirs? Or talked in DM? Is it just one interaction or is it people that I interact with regularly?

@Nuno So, what's the point of it? There are people on my list who I've never interacted with and I was 'approached ' this morning by someone whose parts I really didn't want to have slung through my inbox. Does this mean it's someone who messaged me before, I deleted his attempt to engage with me and they've now changed their name?
As a female on here, we don't need to encourage these stalker types. I must be honest about this.

@Nuno I don't recognize some on mine ,perhaps one time I anwsered a post by them