The phrase often implies a need for someone to change their attitude or approach. After the team's strategy failed, the coach told them to get with the programme.
Pro Tip 2/3
Mild Reprimand
It can be used as a mild rebuke, suggesting someone is not keeping pace. You're still following the old guidelines? Come on, get with the programme.
Pro Tip 3/3
Acceptance Context
It may encourage accepting new norms or practices within a social or work setting. To keep up with the company's culture, you need to get with the programme.