This will depend on the level of COVID-19 risk in your community and the current restrictions enforced. For example, people living in low-risk areas can opt to wear a mask based on their preference and personal risk level. But for areas with a high risk of COVID-19 spread, it’s best to always wear a face mask, especially in public places.
Apart from this, you also need to wear a face mask if you are:
unvaccinated;
immunocompromised;
living with someone at high risk of contracting COVID-19; or
taking care of someone who has contracted the virus.