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Hi Ryan, thanks for you answer. Sites A, B, C and D are verticals usually in a same industry (let's say pubs, hotels and restaurants that belong to the hospitality industry). They all cover different areas with original editorial content but product information (usually technical papers, case studies, etc.) can be the same and apply for any of those verticals. Therefore, a client can run a campaign for its product on site A one month and then on site C two months after. The main goal of moving canonical URLs is having the latest campaign URL indexed by search engines so we deliver results to the client for the latest campaign he is paying for (site C/product_page) and not the original campaign he did months ago (site A/product_page).

We know this is a particular way to do things but that's why we ask for advise.

Cheers.

Hi,

We are actually working on a new product information section for our network of websites (site A, B, C and D) where product landing pages allow to download information in pdf format and are active for downloads during a period of two months (active form for commercial reasons) with a unique URL (the case today). Here is a possible scenario for these product landing pages in the near future:

1. Product is promoted in website A during 2 months (January to February) so canonical URL = A/page. Once expired, the product info. download form disappears.

2. Customer decides to promote the same product in the same site A as well in site B from April to May so canonical URL will still be A/page. Canonical URL of B/page will point to A/page.

3. Customer decides to relaunch his product promotion this time in site C from July to August so canonical URLs of pages A/page and B/page will now point to C/page as the latter will be the only product campaign active with a download form

4. At the end of the year the customer does another campaign for the same product this time in website D so we will change the canonical URL of pages A/page, B/page and C/page to D/page as the latter will be the only product campaign active with a download form

The obvious question here is: will this way of changing canonical URLs dynamically hurt the SEO of the section, pages, one particular website or the whole network ?

Would it be better and safer to just keep the first canonical URL forever? A/page in this example

Thanks so much for your input on this.