How many listings does each brand have, in each retailer, this week?
That’s share of shelf. The oldest question in trade marketing — and, until now, the answer came in a monthly spreadsheet with a two-week lag. Shelfy answers it every Monday, with 6 weeks of history, by category and retailer.
Share of shelf, defined.
Share of shelf is the proportion of active listings your brand occupies in a category, at a retailer, at a given moment. If Cotodigital has 100 active TV listings and your brand has 28, your share is 28%. Sum the top 12 brands, and you have the competitive map.
It’s a leading indicator of market share and channel availability.
What we measure, how we measure it.
Weekly ranking
Per (retailer × category × brand). Active listing count, 6-week sparkline, week-over-week delta.
Daily mode
For point-in-time investigation. Pick any specific day and see the exact picture from that moment.
Category average
Your brand vs. the top-N average. Catches when you’re moving above or below the category as a whole.
Brand compare
Side-by-side KPIs in the brand-comparison view. Up to 5 brands, same period, every retailer.
Brand distribution, week by week.
A stacked area chart shows how share redistributes among the top-5 brands across 6 weeks. You see structural trends — not just last week’s movement.
What you can cross with share of shelf.
“Where am I growing and where am I shrinking, retailer by retailer?”
“Is my drop unique to me, or did the whole category drop?”
“Which new brand entered my category strongly this month?”
“Is my share correlated with my relative price?”