A domain is the human readable translation of the IP address which points to particular nameservers.
Domains have particular rules such as
- No spaces
- No symbols
- A domain can contain a hyphen (-) but it mustn’t start or end with one!
- Legally claimable (no trademarks)
Obviously it will depend on availability but you should want a domain that is, identifiable for your business or product(s), easy to remember/input and is relatively short.
My domain is short and easy to remember, yours should be too, no one wants to type in https://yourdomainistoolongandeasytospellwrong.co.uk