Met a total stranger last Sunday,helped him with the Grocery since he was new to the city.
Next day,I see him in "People you may know" on LinkedIn.Neither of us did a search on each other's name.
We just exchanged numbers since he is from my place back in India.Extremely creepy.

Did you store his number? If LinkedIn has access to your contacts, then it'll just be matching the stored number to the one on his profile

Mobile number is more than enough

@linux-colonel yes,I did.That makes sense. But I don't have the LinkedIn mobile app. Saw the suggestion on laptop.

@sharurox your friend could have the app installed. Otherwise, I don't see a connection between you too

@asgs I guess he would have had it.
But the suggestion must have come to him I would imagine.

Same thing with Facebook BTW

@sharurox, LinkedIn detect both accounts are related, and show it to both parts. It has a lot of info. As an example, if you get a Google Calendar invite with several participants, LinkedIn could show you all the people in the meeting, even if they don't use the same email address on their accounts.