Is it necessary to varnish an acrylic painting?

Varnishing an acrylic painting is not strictly necessary, but it is often recommended to protect the artwork from dust, UV light, and environmental factors. Varnish can also enhance the colors and provide a uniform finish, either glossy or matte, depending on the desired effect. However, it's essential to wait until the painting is completely dry before applying varnish to avoid damaging the artwork.