If your TLD is recognisable (e.g. .com, .net, .org) then no need - people will recognise it as a domain. However, if you've got a new-fangled TLD (.recipies, .

If your TLD is recognisable (e.g. .com, .net, .org) then no need - people will recognise it as a domain. However, if you've got a new-fangled TLD (.recipies, .shoes, etc) then use 'www' - without context, people aren't going to recognise [redacted] as a URL, but they will recognise [redacted] as one.