The domain name is your website’s address on the web so choose a good one that is:

• Descriptive: Think about the name of your company and the content you’ll put on your site. The domain name is one of the first things people notice about a site so it should provide a good idea what your site’s about at a glance.
• Easy to remember: Keep the domain name short and simple. If it’s long and complicated, it’ll be hard for people to remember.
• Adaptable: A domain name is likely be tied to your site for a long time so choose one that will work if your site’s content changes over time. If Onadiva eventually plans to include other collectibles, onadivacollectibles.com would be a better domain name than onadivabaseballcards.com.