Question about setting up both www and non-www domain names
I had a droplet set up running off an IP address and I needed to add a domain to it.
I added say 'www.foo.com' using the domain control panel.
My client also wanted 'foo.com' to work and I was in a hurry, so I simply added that domain as well.
Now both work fine (there aren't any redirections).
Reading back over the DNS documentation however, I see that I apparently shouldn't have done it that way. The correct procedure is to have added the bare domain foo.com and then added the www version as an alias?
What are the advantages to doing it that way? What's wrong with what I did? Have I set myself up for problems in the future?