Information gain

What is information gain?

Information gain is the amount of new, useful information a page offers beyond what other pages on the same topic already provide. A page with high information gain adds original data, first-hand experience, new examples, expert insight or a better way of explaining something; a page with low information gain rewords what already ranks.

The term comes partly from a Google patent on estimating the “information gain” of documents for a user who has already seen other documents on a topic. A patent shows an idea Google has explored, not proof of how ranking works today, so treat “information gain score” as a useful way of thinking rather than a known metric. Google’s own helpful content guidance makes the same point plainly: it asks whether content provides original information, research or analysis, and whether it adds substantial value compared with other pages in search results.

Why information gain matters for SEO

When ten pages say the same thing, a search engine has little reason to rank yours, and an AI assistant has little reason to cite it. Original material is what makes a page worth ranking and worth quoting.

It also protects you against the flood of generic content, including mass-produced AI text, that copies the structure of top results. Content built from your own data and experience can’t be cloned easily.

How to add information gain

1. Read the top-ranking pages and list what they all say. That is the baseline, not the goal.
2. Ask what you know that they don’t: your own data, tests, customer questions, mistakes, costs, photos.
3. Add at least one thing no other page has: an original table, a worked example, a quote from an expert, a calculator.
4. Show first-hand experience: what you did, what happened, what you would do differently. It supports E-E-A-T.
5. Cut sections that only restate what every other page says, unless readers genuinely need them for context.

Information gain example

Every top result for “best time to post on LinkedIn” lists the same days and hours from the same studies. A page that adds results from 500 of your own posts, broken down by industry and post type, has clear information gain and is the one other writers will link to.