In-store navigation tells a shopper where a specific product is in this specific store: the aisle and the shelf, not merely that it is stocked. It is wayfinding narrowed to a retail floor, and it lives or dies on data nobody usually maintains.
The value is real. Large-format grocery and DIY lose sales to shoppers who cannot find an item and will not ask; a search that ends in "aisle 14, bay 3" is a direct conversion, and it also removes the most common question staff answer.
The caveat is planogram drift. The system is only as good as its map of where things are, and shelves are reorganised constantly: seasonally by plan, and daily by whoever restocked. A navigation tool that is right eighty percent of the time trains shoppers to stop trusting it, and after that it is worse than nothing because it consumed the trust as well as the budget.
So the question to settle before any hardware is bought is who updates the planogram data, how often, and how a wrong location gets reported and corrected. If there is no answer, the project is a mapping problem wearing a screen.