It should be standard practice to clean your lint trap after each load of laundry. Once a year, though, it is important to also fully clean your dryer vent. This hose that runs from your dryer outside is vital the the health and safety of this appliance. By cleaning it, you can make it run more efficiently and reduce the chances of an accidental fire cause by excess buildup.
Read more about this topic here: https://www.porch.com/advice/clean-dryer-vent/
