They can be controlled via feed and via hard coding. I would really like to control them via feed as I already have a product feed going out, but that requires me to add the canonical tag to every product page to do this. Since I have seen many canonical problems people have inflicted on themselves I was wondering if you guys could make sure my reasoning is correct.
There is no duplicate for this page but since canonical is required for rich snippets I would simply add it in the <head> as <link rel="canonical" href="widgets.com/blue.html"/> and have it simply reference itself? Then I could roll this out to all product pages with each page referencing itself in the canonical and that would be sufficient?
Is this the correct way to do this in order to get rich snippets or could this potential hurt my site.
Googlebot can access multiple (not as simple) URLs. Even if the key information on these URLs is the same as your preferred version, they may show slight content variations due to things like sort parameters or category navigation. So Google can have some problem with same type of url to avoid this we use this tag
That's actually a relative link to the page Link from the current location, so if you're at example.com you're saying the canonical page is example.com/Link and if you're at example.com/some-directory/ you're saying the canonical page is example.com/some-directory/Link ... I really don't get the point?
IMO Better to leave it off unless that's the actual canonical URL ... There have been reports of things getting REALLY messed up from canonical tag errors and the situation taking excessive amounts of time to get corrected in Google's indexing.
What am I missing or not understanding about your post?
@themadscientist, thank you for the information. If canonical is required on all pages like the link from the google post says above how would you implement it in my example, since it is required i cannot not add it.