Customers could be the plural for Customer. Customer’s is definitely the singular possessive sort of Customer. Customers’ would be the plural possessive sort of customers. The context: who, what, in which, when e.g. ordering a table in a restaurant for a night out with your lover vs a table https://seovragenlijst08519.blogkoo.com/getting-the-varo-customer-service-to-work-46290608