If this is the first time using your toaster, this is normal.
Your elements are being conditioned.
Empty the crumb tray. A build up of crumbs can burn or cause a
fire.
Some crumbs or pieces of bread may be stuck in the toaster.
Unplug, remove the crumb tray then turn the toaster upside down
over a sink or bin and gently shake the crumbs out or use a soft
brush to clean inside your toaster