Primary-Source Spec Blocks
Numbers with a source link next to them, so the model does not have to guess.
Hallucinated specs are worse than silence: the answer names you and gets the ingredient, wattage or return window wrong. Pages that put the number in text, next to a primary source (lab PDF, retailer listing, your own spec sheet), are the ones systems can quote without inventing a digit. This is unglamorous on-site hygiene, and it is why some smaller brands get cited accurately while louder brands get cited incorrectly.
Put every claim you would fight about into HTML: concentration, count, dimensions, materials, trial length, warranty, shipping window. Do not bury them in an infographic. Link out to the document that supports the figure. Use the same SKU name as the PDP, Merchant Center and ads, so entity joining does not split you into two products. If a journalist or a retailer already hosts a cleaner spec table than you do, you will lose the citation to them — that is a page problem, not a 'GEO tool' problem.
Keep a claims list the same way a performance team keeps a banned-phrase list. When ads, PDP and comparison pages disagree, the model will pick one and you will not like which. Update the spec block the same week the offer or formula changes. Citation work is maintenance. A quarterly 'GEO campaign' that publishes six blogs and then stops will decay as soon as a retailer updates a competing table. Put the spec URL on the same calendar as creative testing so it is not an orphan SEO ticket. Write the owner and the next date on the same line as the asset, or it will not happen.
Best for: Categories where a wrong number is expensive — supplements, electronics, furniture, anything sized.
Pros
- Directly reduces wrong-fact mentions
- Cheap to maintain once the template exists
- Makes every other tactic on this list safer to quote
Cons
- Does not get you named if nobody is looking for the spec
- Legal review can slow publication of the useful numbers
- Won't save thin pages that have no comparison or review shape