Q: I built a complete cluster a year ago and rankings are slipping. I haven't touched it. Is that the problem?

Q: I built a complete cluster a year ago and rankings are slipping. I haven't touched it. Is that the problem?

Short answer: very likely — topical authority isn't a one-time build, and a frozen cluster decays as competitors expand and the topic itself moves.

New subtopics emerge, search intent shifts, and your once-complete coverage becomes partial without you changing a word. Meanwhile competitors keep adding to theirs.

In practice:
— Quarterly, check whether new subtopics or questions have appeared in your topic (People Also Ask and competitor new pages are good signals).
— Add or update cluster pages to cover them, and link them in.
— Refresh the pillar to reference the new pages.

Think of a cluster as a living map, not a finished monument. The sites that hold authority are the ones still feeding the topic two years later, not the ones that hit "complete" and walked away.

Got a content-decay question? Send it in.