In most businesses, product data does not sit in one place. The stock code and price are in the ERP, the product description is in a presentation marketing prepared, the dimensions and the technical table are in a spreadsheet that came from production, and the English text lives on the export manager's computer. The same product exists in five different places in five different states, and most of the time nobody knows which one is current. When you open on a new marketplace, these files are merged one by one; when the person doing the merging takes leave, the work stops. This is not a problem of negligence. Product information is an area everybody touches but nobody owns; as long as no owner is defined, it will keep scattering whatever tool is used.
The bill for this scatter is usually presented in the sales channel. The marketplace does not list the product because a mandatory attribute of the category is empty. The customer returns the product because they saw the wrong dimensions. Sales reports do not add up because the same product is listed under two different names in two channels. When a few hundred product descriptions have to be updated during a campaign, the work turns into a copy-and-paste mobilisation that takes several people days, and in that mobilisation some are always missed. For companies selling abroad the picture is heavier still: every language means a separate text for every product, and after a while it becomes impossible to track which version a translation was made from. As the number of channels grows, you notice that this burden multiplies not per product but per channel; and that is usually where the real bottleneck becomes visible.
Product Information Management (PIM) means holding this data in one centre and in a defined structure. Which attributes are mandatory is set out for each product group from the start: pile height and yarn type for a carpet, power and voltage for a machine, ingredients and allergen information for food. The product record is filled in against this template; a missing field shows on the record and does not have to be hunted down separately. The data that accumulates at the centre is then derived per channel: your own site wants the long description, the marketplace wants a title that fits its own category tree and character limit, the dealer catalogue wants the technical table. The same truth goes out in different moulds, but the source is single and a correction is made in one place.
To be honest, a PIM does not improve product data by itself. If you put incomplete and inconsistent data into the system, orderly but still incomplete data comes out. The hardest part of the implementation is not the software but cleaning up the existing catalogue and settling the attribute templates; that work takes your team's time and nobody can make those decisions in their place. A PIM is also not a stock or order system: price and stock quantity continue to live in the ERP, and the PIM reads them and carries them to the channel. What we can say with confidence is this: once the data is set up properly, opening on a new channel stops being a preparation job done from scratch and comes down to a mapping job of a few days.