If you go on my profile you will see that I have "reached" 703k:
First I thought it was the number of persons who:
- saw an answer of me
- saw a question of me
- or an edit I made on a question
and so on.
But, for example, Daniel Widdis has far more answers and questions than me:
And he only has "reached" 543k.
What does the "reached" property mean on Stack Exchange?