An inventory upload is the process of providing Amazon with inventory-related information such as UPC/EAN/ISBN, title, price, quantity, etc. This information enables Amazon to list your item for sale against the right product detail page in the Amazon catalog.
An inventory upload, also called a feed, is a collection of information on listings organized in files in the following formats:
Inventory Loader format: This file format is used to add/modify/delete listings in any product category.
Price & Quantity format: This is a simpler file format used to make price and/or quantity changes to your listings in any product category.
Book Loader and UIEE formats: These file formats are used to add/modify/delete listings in the Books category.
Thousands of sellers submit thousands of inventory feeds to Amazon feed processing systems around the clock. These inventory feeds are processed in the order received. Each seller has a queue of submitted feeds and one feed must complete processing before the next feed in the queue will start processing.
Price and quantity updates to your current listings are usually the most critical to make first, so if you have price and quantity changes to make as well as new products to load via an Inventory Loader feed, send the Price and Quantity feed first.
A large feed (e.g. large Inventory Loader file) is a feed with over 500 records. Amazon feed processing systems attempt to process each feed in parallel. The benefit of parallel processing increases with the size of the feed up to an optimal size of 30,000 records.
You only need to send your inventory feeds when: (a) you have additional items to list, (b) you need to change the details of an existing item (for example, change the Item Note), or (c) you need to delete items. It is possible to update price and quantity information in multiple feed formats. However, we recommend using the Price & Quantity format as updates are processed much faster using the Price & Quantity feed.
In general, avoid sending feeds more frequently than every 20 minutes as it will slow your feed processing. Large feeds (over 500 records), which will take longer to process, should be spaced farther apart.
No! Placement on the Offer Listing Page is determined by the total cost (item price + shipping) paid by the buyer for your listing. To improve your placement on the Offer Listing Page, you need to adjust your prices downward using the Price & Quantity feed.