Keyword mapping: when should two queries share one page?

Consider two queries about the same product: one asks how to choose it and the other asks how to repair it. Their vocabulary overlaps, but the tasks are different.

My proposed keyword map would include the reader's task, the likely page format, the existing URL, and any overlap with another planned page. I would group queries around an answer a page can actually provide, rather than matching a shared word.

If two queries seem similar, compare what an adequate answer would contain. Could one coherent page serve both without becoming confusing?

How would you handle a broad guide that currently covers several distinct tasks?

I would distinguish a shopping decision from a maintenance task before choosing URLs. A category page can help someone compare products, while a repair guide needs instructions and cautions.

They can link to each other without being merged. The shared product vocabulary is useful context, but it does not make their purposes interchangeable.

Before splitting the broad guide, I would look at which queries and sections appear to bring useful visits. Then document what the new pages would do better.

A split is an editorial hypothesis, not a guaranteed improvement. Record the original URLs and review the change by query group, rather than only watching the site's total traffic.

I would keep a concise overview where the tasks meet, then link to the pages that answer each task properly. That gives the original guide a clear role instead of leaving it as a thin leftover.

The map should also say which page owns each task. That makes future updates less likely to recreate the same overlap.

For affiliate content, the reader task should decide whether a comparison belongs on the same page as an instructional guide. Shared product names do not make the tasks identical.

I would identify the decision being supported and the evidence needed for it. That can make an existing page clearer before another related article is commissioned.