When you manage an ecommerce store a good idea is to have a general representation of the products with functionality to export them in various data formats. These data formats could be files or streams that could be transformed and include necessary information such as products descriptions, prices, availability etc. This way you could put products in selling channels like online ad platforms and comparison price sites. Importing your feed in facebook you can start running facebook dynamics ads which have higher degree of relevance to users as result higher CTR.
Let's take an example how we will import our catalog data in facebook. The simplest way is to go directly to the facebook.com/products which is the catalog manager. Pressing New catalog we import our data feed to facebook, it accepts four type of formats which are rss xml, atom xml, csv, tcsv. These feeds can be uploaded manually or generated daily in a specific link in our online store . The content of such files has to be accurate and well defined. If there is any problem or missing info on some items like the brand or mpn code this item will not be accepted during the import process. A tool to test the content of your feed is debug tool
There some necessary fields also some others are optional, but one very important is the category of each item which should following the Google's product taxonomy.
Google Merchant Center
Another platform that you can import product feeds is google merchant center. There are two reason the first one is to publish in google shopping and second one is the dynamic retargeting ads. Google shopping is not currently available in all countries but dynamic retargeting is, through your adwords account can associate a campaign with a feed from your merchant center account. So prices, photos can appear in display network and user can see again products that have previously visited on your ecommerce store while browsing other favorite websites that running google ads.