Topic cluster
A pillar page and the related articles that link to it, organising a site around topics instead of isolated posts.
What it means for a site you run
Clusters make a site's structure legible to both visitors and search engines: the pillar states the topic broadly, the cluster articles cover the long tail, and internal links bind them. A site organised this way builds topical depth instead of a pile of unrelated posts.
How Blogotter relates
Every candidate keyword is mapped against the pages you already publish, and the topic-cluster view shows which queries would overlap and which would extend a cluster before anything is scheduled.