Open the laptops category page at any big retailer and the brand sitting at the top tends to stay there. It is the same logo week after week, so it is easy to glance at the shelf, decide nothing has changed, and move on. That habit is exactly how teams miss the part that actually matters. The brand at #1 can hold its spot for a month while everything underneath it churns hard, and the churn is where your competitors are either climbing toward you or slipping away from you.
We see this constantly because Crawlbot tracks the consumer-electronics digital shelf hourly across the UK, Poland, South Africa and the Nordics, roughly 7.4 million listings a month across 34 retailers. When you look at the shelf that often, the stable leader stops being the story.
Share of Voice is how visible a brand is on a retailer's category pages. We measure it as the average share of the category page a brand occupies, across the retailers it appears on. If you sell laptops and your products fill three of the first ten slots on a page, you own a chunk of that shelf, and that chunk is what a shopper sees before they have decided anything.
It is worth being clear that this splits into two parts. Some of the visibility a brand has is paid: sponsored placements where the retailer's retail-media programme pushes a product up the page for money. The rest is organic, earned through range, sell-through and the retailer's own ranking logic. The two behave differently and they tell you different things, which is why we keep organic and sponsored visibility separate. Organic position is a clean read of how strong your range really is on that shelf. Sponsored is a read of who is spending. Lump them together and you cannot tell whether a rival is genuinely winning or just outbidding you for the week.
Here is the case that makes the point. Across May 2026 we watched the laptops shelf at Currys. HP held the #1 visibility spot every single day of the month. Not once did it slip. A brand manager checking the shelf on the 1st and again on the 31st, looking only at who was on top, would have written down "HP leads, no change" both times and closed the tab.
Underneath that stable #1, the shelf reshuffled hard:
| Brand | Rank, start of May | Rank, end of May | Move |
|---|---|---|---|
| HP | 1 | 1 | No change |
| ASUS | 8 (last) | 3 | Up 5 |
| Acer | 4 | 2 | Up 2 |
| Samsung | 3 | 6 | Down 3 |
| MSI | on shelf | off shelf | Dropped out |
ASUS went from dead last to third. Acer moved up into second, right behind the unchanged leader. Samsung fell from third to sixth. MSI disappeared from the shelf entirely. Every one of those is a real competitive event, and all four happened in the space the #1 watcher never looked at. The most striking one is ASUS: a brand going from invisible at the bottom of the page to top three on someone else's shelf. If that someone is you, a competitor just became a direct threat over four weeks and you had no idea.
None of this movement announced itself. ASUS did not jump from #8 to #3 overnight. It climbed across the month in small steps as range changed, stock came in, and the retailer's ranking shifted. The only way to see a climb like that as it happens is to sample the shelf often enough to catch the steps. Check once a month and you get two snapshots with a fog of unexplained change between them. Check hourly and the climb is a line you can watch, react to, and trace back to a cause.
That is why Crawlbot reads the shelf every hour rather than once a day or once a month. By the time a monthly report lands, ASUS is already in your top three and the question is no longer "is something moving" but "why did we not see this coming". Hourly sampling turns that into a question you can answer in the same week, while there is still something to do about it.
Frequent sampling also catches the things that only exist for a few hours. A sponsored push that runs over a weekend, a competitor's launch that floods the first page on day one, a stock-out that quietly drops a rival down the page: all of it is invisible to a monthly check and obvious to an hourly one. The shelf is not a monthly object. Treating it like one is the mistake.
The leader is the least interesting number on the page. If it has not moved, it is telling you almost nothing. The signal is in the movement underneath.
A few things worth watching on your shelf, in rough order of usefulness:
The leader at #1 is a comfort number. It feels like the shelf is stable, and that feeling is the trap. Real share of voice lives in the reshuffle below the top spot, and you only get to see it if you are looking often enough to catch it in motion.
7.4 million listings, 34 retailers across the UK, Poland, South Africa and the Nordics. Free monthly report with brand rankings, sponsored split and content benchmarks.
Download the Free Report