2. Synchronize some (not all) products or product information from icecat.biz
If it doesn't synchronize some (not all) products or product information from icecat.biz, most likely you're using Open ICEcat and it has a limited database including some specific products, categories, or descriptions(including multiple languages).
For example, the product with model 94488228 doesn't have a description in Free Open ICEcat:
but it has in Full ICEcat: