--enable-analytics: Enables anonymous analytics.

--disable-analytics: Disables anonymous analytics.

The Google Privacy Policy describes how data is handled by these services.

Update your path

You can update your PATH variable for the current session at
the command line, as shown in Get the Flutter SDK.
You’ll probably want to update this variable permanently,
so you can run flutter commands in any terminal session.

The steps for modifying this variable permanently for
all terminal sessions are machine-specific.
Typically you add a line to a file that is executed
whenever you open a new window. For example:

Determine the path of your clone of the Flutter SDK.
You need this in Step 3.