The «Təhlükəsizlik» (Security) page lists every device currently logged in to your account, with its browser, operating system and last activity time. The device you're using is marked «Bu cihaz» (This device).
Close any device you don't recognise with the «Çıxış» (Log out) button;
«Digər cihazlardan çıx» (Log out other devices) closes all other sessions at once;
If you spot a device you don't recognise, change your password too — changing the password closes all other sessions automatically.
Tips for protecting your account
Choose a password of at least 10 characters that you don't use on other sites;