FreeBSD update ports

As referred here: https://www.freebsd.org/doc/handbook/ports-using.html

The Ports Collection is a set of Makefiles, patches, and description files stored in /usr/ports. This set of files is used to compile and install applications on FreeBSD. Before an application can be compiled using a port, the Ports Collection must first be installed. If it was not installed during the installation of FreeBSD, use one of the following methods to install it:

# portsnap fetch
# portsnap extract
# portsnap fetch update

So I think a
# portsnap fetch update
is enough for allready Ports Collection installed freebsd systems.