The First Epistle of Peter was written in or around AD 63 to a group of Christians living in Pontus-Bithynia, an area in modern-day Turkey, just south of the Black Sea. These people were beginning to experience significant social and cultural marginalization as a result of their faith in Christ.
But it was not yet formal or fatal persecution.
Thomas Schreiner says here:
“The only specific suffering noted is discrimination and mistreatment and verbal abuse from former colleagues and friends” [1]