Select tables to reset: If you wish to reset your store, you can choose what you would like to delete before your import. Only tick these boxes if you are sure you would like them deleted because there is no undo. Leave everything unticked if you want to leave your store unchanged before your import
New Items: Specify what to do with new items from your feed. You can either add them as normal, or skip them to run a pure update only.
Existing Items: You can choose what to do with items in your feed that are also in your store already. You can either update them based on new data from the feed, or simply skip them to only add new products.
Identify Existing Products by Matching Field: In order to identify existing items, you will need to have a field in your feed that matches the same field in your OpenCart store. Here you can specify which field this is, choosing between Model, Name or SKU. It is recommended that you use Model or SKU in preference to Name, as the match must be exact in order to identify existing products. Using Name is more risky.
Items in store but not in file: Specify what to do with items in your store that are not in the file. If your supplier has stopped selling a product you may want these deleted, disabled or ignored.
Items to Import: This setting lets you make sub sets of products to import. This can be particularly useful if you find your server is struggling with the load of adding / updating all the products. To use the setting select 'Range' then add a range of products say 1 -> 1000. Once completed you can add more products by running it from 1001 -> 2000 and so on doing manageable subsets your server can handle.
Profiles: By typing a name of a profile in the top right input box you can save all settings up to this point for easy loading. You can find more on this in the profiles section. Saving a profile also allows you to run it automatically via cron.