You can create BGP community lists so that you can configure route maps based on community lists.
Both the BGP Communities attribute (RFC 1997) and the BGP Large Communities attribute (RFC 8092) are supported. The BGP Communities attribute is a 32-bit value split into two 16-bit values. The BGP Large Communities attribute has 3 components, each 4 octets in length.
In route maps we can match on or set the BGP Communities or Large Communities attribute. Using this feature, network operators can implement network policy based on the BGP communities attribute.