This is the 1869th most frequent Russian word.
перешел
"Перешёл" means "crossed" or "switched" (past tense, masculine).
The word 'перешёл' refers to the action of crossing something.
Он перешёл через дорогу.
He crossed the road.
The word 'перешёл' here means to transition or transfer from one state to another.
После долгих раздумий, он перешёл на новую работу.
After much consideration, he transitioned to a new job.
In this case, 'перешёл' is used to indicate switching to a newer version of something.