let's

verb2

1. •
   Used to form the cohortative of verbs, equivalent of the first-person plural imperative in some other languages.

   • Let’s eat lunch sometime, shall we?
   • I say let’s dance.
2. •
   Used to form the hortative of verbs, equivalent of the second-person plural imperative in some other languages, chiefly instructional

   • Let’s make sure we don’t forget proper punctuation, let's not let those mistakes happen again.
   • Hey guys, let’s check to make sure that we proofread.