A Single-entry Greece Visit Visa allows you to enter the Schengen area only once within its validity period. Once you exit the Schengen zone, the visa is no longer valid. A Multiple-entry visa, on the other hand, permits several consecutive visits to the Schengen area within its validity period of up to 5 years, provided each stay does not exceed 90 days in any 180-day period. A Multiple-entry visa is more suitable for frequent travellers, while a Single-entry visa is ideal for those planning a one-time trip to Greece.