analysis by 36 examples of krypton, showing the effect of the final Canonical tag.
what role? ?In order to avoid duplicate content included
said the station optimization, many webmaster will invariably say the content of the quality and frequency of updates. In fact, personal opinion, this understanding is too narrow. Love Shanghai in January this year, Webmaster Platform published information "love Shanghai has supported the Canonical label", I do not know whether we have to seriously study, I have personally confirmed that lack this tag can make up for the content in the original to a great extent (of course is not the original effect, 100% can realize the content that hope you understand). We see the love Shanghai Canonical tags understanding: