One SEO professional was curious about canonicals and how they play into robots.txt.
Their situation is they have no landing pages for an ads campaign. A part of the SEM team’s content was taken by products or service pages.
For these particular landing pages, is it the correct procedure to add a canonical tag? That way, they can tell Google that the canonical pages are different.
Their main question is, can you shift the order of influence to certain types of pages, by using the canonical on that page, to help the page rank better?
John explained that yes, you can do that. However, it also depends on how you setup the ads landing pages.
If they’re blocked by robots.txt, then Google will never see the canonical. So, make sure that your robots.txt still allows for Google to crawl the page and so they actually see it.
This happens at approximately the 4:54 mark in the video.