Can someone explain what does active today mean on instagram?

I’m trying to understand the “Active today” status I’m seeing in someone’s Instagram DMs. Does it mean they were actually on the app at some point today, or could it show up just from notifications/background activity? Also, how accurate is it and is there any delay before it updates?

“Active today” means the person was likely using Instagram recently, but it isn’t always precise and can include background activity or notifications. It may not be real-time and can have a delay.