There is a widespread idea in SEO that says "the more content, the better." It is true right up until it is not. When a website accumulates dozens of short articles that half-overlap with each other or never got a single visit, Google does not simply ignore them: in some cases, that mass of weak content creates an overall impression of mediocrity that can drag down even the good pages on the same domain. Content pruning means reviewing that archive with a critical eye and deciding, article by article, whether it stays, gets merged with another, or gets deleted.
The three signs a page is a pruning candidate
Zero organic visits in the last twelve months despite being published for a while. Content that covers almost the same topic as another article on the same blog, competing with each other instead of adding up. And outdated data, prices or screenshots that no longer reflect the reality of your business or your sector. None of these three signs on its own forces you to delete anything, but when two or three coincide on the same page, it is a strong candidate.
Deleting is not the same as merging
If two articles cover the same topic from similar angles, it is almost always better to merge them into one, more complete piece than to simply delete one: that way you keep the links and authority that content may have accumulated over time. Pure deletion is best reserved for content that has no real value left, not even combined with something else, where redirecting would just mean indexing something empty under another URL.
What to do with the URL once you decide to delete
Never leave the old URL simply returning a plain 404: if that page had any inbound links, even modest ones, you will lose that value for no reason. The right move is to redirect with a 301 to the merged page, or to the most related category or article if there is no direct replacement. This preserves the signal for Google and avoids frustrating anyone arriving from a link or an already-indexed old search result.
How often should you review the whole archive
Once a year is usually enough for most corporate blogs: it is enough time for an article's performance to settle and be judged with real data, without being so infrequent that too much weak content piles up between reviews.
Frequently asked questions
Isn't it better to just leave weak content untouched, just in case?
The risk of leaving it is not neutral: the higher the proportion of your site made up of low-quality content, the harder it is for Google to decide your domain as a whole deserves trust. "Just in case" usually costs more than reviewing with judgement.
How many pages should be pruned at once?
You do not need to do it all in one batch. It is safer to review in batches of twenty or thirty pages, measure the effect on the domain's overall traffic, and move on to the next batch if the result is neutral or positive.
Does content pruning apply to service pages too, or only the blog?
It applies mostly to the blog, because that is where experimental or lower-quality content tends to build up over time. Service pages are rarely pruning candidates, unless they describe a service you no longer offer.