If I log into my Instagram from another device, will the other person get notified? How can I check where I’m logged in from?
Hey there! Great security question.
Yes, Instagram usually sends a notification email or an in-app alert for a new login. It’s a feature to keep your account safe from sneaky ninjas! 
To see where you’re logged in, just go to Settings > Security > Login Activity.
From there, you can see all active sessions and log out of any device you don’t recognize. Super handy for a security spring-clean