How search volume is estimated
Search volume is an estimate of monthly searches per marketplace, based on Amazon's own search data and updated weekly. Small long-tail keywords get an estimate too; "< 99" means practically nobody searches for it.
Amazon doesn't publish exact search counts. JustRanks estimates them per marketplace from Amazon's own search data, updated every week. The number moves when shoppers search more or less.
Small keywords
Many long-tail keywords are too small for Amazon to report. JustRanks estimates them anyway. These estimates are rough by nature: they show that a keyword is small and roughly how small, not an exact count.
Volume history
On the Keywords tab of a product, the button next to a keyword's search volume opens its history: one estimate per week, with the highest and lowest week of the period. Weeks without data show as gaps.
What the labels mean
- A number, such as 12,345: estimated searches per month.
- < 99: practically nobody searches for it.
- < 150: a small keyword that hasn't been estimated yet. This is usually temporary.
Where it is used
Search volume appears in Research, at review when you add a product and on the Keywords tab. Together with relevance, it decides how much a keyword counts for your product; see How keywords are weighted.