Vinyl is an excellent material of choice. Many people who prefer low-maintenance setups prefer them as they don't require painting or staining like alternatives made with wood or other materials. Like any other surface they will can dirty from soil or moss splashed by rain. However, they tend to be very easy to clean using something like a pressure washer or light scrubbing.
They are great alternatives for people with children and pets. Wood fences can lead to incidents with splinters. Aluminum fences can lead to situations where both kids and pets can get stuck in them leading to unforeseen accidents.
These fences are usually made from a sturdy material. They are resilient to all-season weather. In the event of an accident, they tend to be very easy to repair. The panels themselves are modular. It's a simple matter of replacing the specific boards that have been damaged. With regular wear and tear and small incidents, it will be unlikely that you'll need to replace an entire panel, avoiding waste.