Msg#: 4626182 posted 12:24 am on Nov 27, 2013 (gmt 0)
I do even on sites that are canonicalized via htaccess without much chance of on-site duplication, just because if there's a lazy or forgetful scraper out there who copies a page(s) and forgets to change it then their copy is pointing to the original as the source.
Basically I go with the theory of: "Can't really hurt, but could help, so why not?"
Msg#: 4626182 posted 9:16 am on Nov 27, 2013 (gmt 0)
Yes, just make sure it goes in the <head></head> section or it will be ignored for security reasons [if it wasn't ignored in the <body></body> section someone could come along and drop it in the comments on sites that allow them, etc] and it's best to use a fully-qualified URL, so