Can anyone explain to me what this section is? What are the numbers? Are the pictures people’s profile photos? I really don’t get it

https://cdn.nostrcheck.me/005539663b606151e96a323b968fd065cc0e46bdb290e693f621cf47c5c5b884/299a9deb56bcd1b26485032c12e2cd887053ad57b5876da690128c5064072147.webp