Most personal injury websites are mostly noise, and I mean that as a measurement, not an insult. In my working experience across this vertical, a typical PI site more than two years old runs a Worth-to-Index ratio in the single digits: of every hundred URLs Google is spending resources on, only a handful serve a query that could ever produce a case. This piece explains the ratio, the crawl economics behind it from Google's own patents, how noise accumulates on law firm sites specifically, and the prune-merge-keep discipline that fixes it.
The ratio, defined
Worth-to-Index is the share of a site's indexed URLs that do real commercial or supporting work: pages that either serve a query an injured person actually types or structurally support a page that does. Everything else is carried weight: tag archives, paginated fragments, parameter duplicates, image attachment pages, author archives for authors who wrote twice in 2019, press releases nobody will ever search for, and the doorway fleets covered earlier in this series.
The number matters because the systems reading your site do not have infinite patience, and more importantly, because what they crawl and store shapes what they believe your site is. A site that is five percent signal teaches the machine, a hundred times a day, every day, that it is mostly noise, and the machine is a diligent student.
The economics are in the patents, with a formula
Crawling costs Google money, so Google engineered frugality, and the engineering is public.
The crawl-scheduling patents, US 8868541 and the crawler scheduler family behind US 10621241, describe the budgeting directly: finite crawl resources allocated across an expanding web, scheduled per document by importance and by how often content actually changes. Pages earn visits; they are not owed them.
One member of that family even publishes a formula worth reading twice. A document's crawl priority can be computed as its PageRank squared, multiplied by its URL change frequency. Importance, squared, times freshness of change. Read what that means for the noise on a law firm site: a thin archive page with no authority and no changes earns a priority near zero, and it STILL gets crawled sometimes, which means it is still spending budget the money pages could have used. Multiply by two thousand junk URLs and the practice pages that sign cases are sharing their oxygen with dead weight.
The quieter cost compounds it: the site-quality machinery forms its judgment from what it sees. When ninety-plus percent of what it sees is scaffolding, the prior the whole site starts from is a scaffolding prior. The noise does not just waste crawl. It testifies.
How law firm sites fill with noise
Nobody plans a five percent ratio. It accrues through perfectly normal decisions.
The CMS ships it: every image an attachment URL, every tag an archive, every author a page, pagination forever. Nobody turns the defaults off because nobody knew they were on.
Vendors add it: a blog program measured in posts per month produces hundreds of thin pages aimed at nothing; a city-page initiative adds forty templates; a redesign leaves the old URLs alive in parallel because deleting felt risky.
And nothing removes it, because removal is nobody's job and feels like destroying work that was paid for. Sites only ever grow. The ratio only ever falls. Ten years of normal operation produces exactly what I keep finding: a thin layer of real pages buried in an index of accumulated exhaust, with nobody at the firm able to say when the burying happened, because it never happened on any particular day.
The audit: classify every URL once
The Worth-to-Index audit is unglamorous and decisive. Pull every indexed URL. Classify each one into exactly four buckets: commercial (serves a case-producing query), supporting (earns its place by helping a commercial page: real guides, real FAQs, genuine local pages), structural (necessary plumbing: contact, about, policies), and noise (everything else, honestly labeled).
Compute the ratio. Then assign every noise URL one of three verdicts, and this trio is the whole method: prune, merge, or keep. Prune what serves nothing: deindex or delete, with redirects where anything external ever pointed at it. Merge what has fragments of value: fold three thin posts into the one real resource they should have been, redirect the husks. Keep only what earns its place, and write down why.
Two cautions from doing this on live firms. Never mass-delete on the first pass; check what quietly earns links or entrances first, because every site has two surprises. And sequence redirects like surgery, mapped before cut, because the crawl machinery treats URL changes as events and sloppy ones leak history.
Reading your own crawl: the server-log hour
You do not have to theorize about any of this, because the evidence is already being written to your own infrastructure. Every visit the crawler makes lands in the server logs, and one hour with those logs answers the question most firms have never asked: what does Google actually spend its attention on here?
Pull thirty days of log lines filtered to the crawler's verified user agents, group them by URL, and sort by hits. The distribution is the diagnosis. On a healthy site, the money pages and the fresh content sit at the top of the table. On the typical aging firm site, the table is upside down: parameter variants, paginated archives, and attachment URLs soaking up the visits, the practice pages that pay the bills getting touched a fraction as often, and a long tail of URLs the firm forgot existed still being dutifully checked. I have watched owners meet this table for the first time, and the reaction is always the same: nobody decided any of this. That is the point. The crawl allocation is the sum of a decade of defaults, and until someone reads the logs, the sum is invisible.
Two supplements make the hour sharper. The crawl stats report in Search Console gives the official summary, totals, response codes, and discovery trends, which corroborates the logs without replacing their URL-level detail. And a simple cross-check closes the loop: of the hundred most-crawled URLs, how many are in your commercial or supporting buckets? That single overlap number is the lived version of Worth-to-Index, the budget as actually spent rather than as theoretically allocated, and it is the before-and-after metric the cleanup gets measured against.
If your vendor has never once mentioned your server logs, that is also information. The logs are where crawl economics stop being a concept and become an invoice, and the pruning discipline in this piece is how the invoice gets renegotiated.
What changes when the ratio rises
The after-state is consistent enough that I now consider it the point of the exercise. Crawl attention concentrates on the pages that deserve it; fresh changes to money pages get noticed faster, which is exactly what the scheduling formula predicts when importance stops being diluted. The site's self-description cleans up: what the machine sees is now mostly signal, and the quality prior moves with it. And the humans benefit in the same motion, because the pruned site is the navigable one, where the next click from any page is a real page.
I keep the before-and-after as a standing deliverable, a redacted Worth-to-Index sheet, because it is the rare SEO artifact an owner can read without translation: here is what you were, here is what you are, here is the list of what we removed and why. No mystique. Arithmetic with a crawler attached.
Where this sits, and the honest scope note
Worth-to-Index work is Pillar 1, Technical Stability, in my framework: the layer every later investment stands on. It is also deliberately the FIRST thing examined in the full website audit I run as the PI SEO Diagnostic, because content and authority spending on a noise-heavy site is fertilizer on pavement; the ratio tells us whether the ground can even hold what the plan wants to plant. Nine deliverables, ranked findings, refundable until the roadmap is clear, capped at three a month.
One honest boundary: the ratio is a diagnostic, not a deity. A ninety percent ratio on a nine-page site is not strength, and a sixty percent ratio on a deep, genuinely useful library can be magnificent. The discipline is not minimizing pages. It is refusing to carry URLs that cannot say what they are for.
My free PI Authority Scorecard asks the ownership question in its first pillar: does anyone at your firm know this ratio exists, let alone its value? Most firms meet the concept in that question. The technical guide behind it is free at behzadhussain.me with the research at behzadhussain.me
Your website is spending Google's attention every day with or without you. The only question is whether it spends that attention on the five pages that sign cases or the two thousand that never could. Count once, and the answer stops being a feeling; read the logs once, and it stops being deniable.