What are OpportunityAccessLevel in AccountTeamMember in Salesforce?

<dt>Level of access that the User has to opportunities associated with the account. The possible values are:

• None
• Read
• Edit

This field must be set to an access level that is at least equal to the organization’s default opportunity access level. In addition, the users’s AccountAccessLevel, ContactAccessLevel, OpportunityAccessLevel, or CaseAccessLevel field must be set higher than the organization’s default access level. This field is available in API version 37.0 and later.</dt>