You can update traits about users and companies mainly in two ways:
by triggering an .identify call (for user traits) or .group call (for company traits). Learn more
from the UI in June (this would not go to your CDP in case your using one)
If you need to update your traits on an ongoing basis check out this article.
If you're not sure which traits to send here you can find some examples.
Remove a trait
When you send an identify call to update user traits, and leave any traits out of the call, they’ll be removed from the user’s profile when it updates.
Think of it like a fresh update: whatever traits you include in the identify call will stay, but anything missing will be cleared.