If you publish a post to your HubSpot blog, that content can be found in a few different ways. The post will be listed on your main blog listing page, the author's listing page, and the topic listing page, if you tagged the post with a topic.
HubSpot automatically canonicalizes all blog posts created on the COS. By adding a canonical tag to every blog post, HubSpot ensures that search engines do not double count and penalize content that appears on multiple blog pages.
Blog topic and pagination listing pages have their canonical URL tag set to the URL of the topic page itself. For example, http://blog.hubspot.com/marketing/topic/marketing-automation is a listing page for a particular blog topic. This page automatically, includes the following meta tag:
<link rel="canonical" href="http://blog.hubspot.com/marketing/topic/marketing-automation"/>
Blog author pages receive their own canonical URLs so that each author can be found in search engine results pages.
HubSpot also adds canonical tags to your website and landing pages.