An SEO expert was testing my site, and noticed that my URLs contained the special character
:. He said that would create duplicate content, because google would interpret any url containing
: as two separate URLs: one with
: and one with
%3A. Is he right?
I suspect this is lies/misinterpretation from your "SEO expert" (such roles do not exist IMO). Essentially
Otherwise you could argue that any non-alphanumeric character could cause duplicate content as they all have an URL encoded entity for someing (eg
Both resolve to the same place, except that