This is the 343rd most frequent Russian word.
затем
"Затем" means "then" or "after that" in English.
Here, 'затем' is used to indicate the sequence of events, meaning 'and then'.
Сначала он пошёл в магазин, а затем на почту.
First, he went to the store, and then to the post office.
'Затем' serves to chronologically arrange the actions, indicating what happens next.
Она поужинала, затем посмотрела фильм.
She had dinner, then watched a movie.
In this case, 'затем' outlines the order of priorities or the sequence of activities.