Is There a User Base Conversion Rate in G A?

I don't think there the ecomes conversion in g a right now, does that? I think we need to create one or use a goal. Goals are actually slightly different to ecommes conversions in g a because they are session let's say my goal is starting up to a news letter. If i signed up to the news letter three times for some reason in one session, that would be one goal, conversion. And so goals are truly a session base metric where we can see, x % of my sessions were good or were successful. You can apply that to as well, how many of my users did a thing i wanted them to do, as a percentage se not really anything