The data for which you need to seek consent varies from one business to another. You must seek consent only for the data that is not required for business operations.
An individual’s email address, phone number, marital status, religion, etc. are considered personal information. Some of this personal information might be required for operational reasons. For example, if an individual has bought services from your business, you must retain their name and address on invoices and orders for record-keeping and auditing.
So, classify personal information as essential and non-essential for operational purposes. Also, find out which information is essential only for marketing purposes. Non-essential personal information needs consents.