LotsBlogEvery operator tracks traffic. But traffic is a lagging signal — it tells you what already happened, not whether your archive is actually building authority.
The real question is operational: is your archive compounding? Three metrics tell you. They take 30 minutes to calculate and give you a lever to pull every month.
Metric 1 — Archive Growth Rate
What it measures: Posts published per quarter.
Why it matters: Consistency is the foundation of a compounding archive. Google rewards sites that publish regularly and predictably. But more isn't always better — the cadence trap is publishing volume without structure.
How to calculate it: Count the posts in your archive from the last 90 days. Divide by 3 if you want a monthly average, or just track the quarterly number.
What healthy looks like: For a 3-posts-per-week cadence, a healthy quarter is 36-40 posts. Subtract scheduled breaks or holidays. The number matters less than the trend: if your archive growth rate is declining quarter over quarter, the archive stops compounding and starts coasting.
What to do if it's low: Don't publish more — publish more consistently. Set a minimum weekly cadence and protect it. The 30-Minute Blog Audit walks through what to check when cadence slips.
Metric 2 — Interlink Density
What it measures: How connected your archive is.
Why it matters: Internal links are the rails your topical authority runs on. A post with zero internal links is an island. An archive where every post has 2-6 contextual links is a cluster that search engines recognise as authoritative on a topic.
How to calculate it: Total internal links in your archive ÷ (total posts × archive age in months). The denominator normalizes for young archives — a 6-month-old blog with 30 posts shouldn't be compared to a 3-year-old blog with 300 posts.
What healthy looks like: An interlink density above 0.3 is solid. Below 0.15, your posts are mostly islands. The sweet spot is contextual links placed inside the body, not a "related posts" block at the bottom. For the full breakdown on how to build density without sounding robotic, see the Internal Linking Playbook.
What to do if it's low: Don't go back and add links to every post at once. Start with your newest posts — add 2-3 contextual links each. Then, during your monthly audit, add links to 2-3 older posts from the same cluster. Density builds naturally over time when you make it part of every publish cycle.
Metric 3 — Refresh Coverage
What it measures: Percentage of your archive updated in the last 12 months.
Why it matters: Stale posts drag down the whole cluster. A post from 2024 with outdated stats signals to both readers and search engines that your archive isn't actively maintained. The How to Write a Blog Article That Compounds playbook emphasizes the 90-day refresh loop for a reason — fresh content keeps the authority signal alive.
How to calculate it: Number of posts updated in the last 12 months ÷ total posts. An update counts if you changed stats, added new internal links, revised recommendations, or updated the meta description.
What healthy looks like: 60%+ refresh coverage means the majority of your archive is actively maintained. Below 30%, the archive starts accumulating stale nodes faster than you refresh them.
What to do if it's low: Start with your top 10 traffic-generating posts. Refresh their stats, update internal links, and check the meta. Then work backward through the archive by publication date. The 10 Things Every Blog Post Needs Before It Goes Live checklist makes a good refresh template too.
How to act on the metrics
Once a month, spend 30 minutes checking all three. Here's the decision framework:
| Lowest Metric | First Lever to Pull |
|---|---|
| Archive Growth Rate | Lock the weekly cadence — protect publishing time, don't add more |
| Interlink Density | Add 2-3 contextual links per new post; audit one old cluster per month |
| Refresh Coverage | Refresh 5 oldest posts or top 10 by traffic — whichever closes faster |
Don't try to fix all three at once. Pull the lowest lever first. Next month, check again.
Where the agent fits
In LotsBlog, the agent tracks all three metrics as part of the weekly production cycle. It flags falling interlink density when a new post publishes without enough links. It queues refreshes on a 90-day cadence so refresh coverage doesn't slip. The operator sees a monthly summary instead of having to calculate each one by hand.
FAQ
What's a good interlink density score?
Above 0.3 is solid for an established archive. Newer blogs (under 6 months) will naturally be lower — focus on building the habit of adding 2-3 contextual links per new post. The density improves automatically.
Should I pause publishing to fix low metrics?
No. Keep publishing on cadence. The metrics improve faster when you add interlinks and refreshes to your existing workflow rather than stopping to fix the archive. Pausing breaks the growth rate, which makes the other metrics harder to recover.
How often should I check these?
Monthly. Set a 30-minute calendar reminder. A monthly check is enough to spot trends before they become problems without obsessing over weekly noise. If you're running LotsBlog, the agent surfaces the metrics automatically in the weekly summary.
Three metrics, one question
Is your archive compounding or just growing? Traffic won't tell you. These three operational signals will. Pick the lowest one, pull the lever, check again next month.
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