How Does the Louis Vuitton Catalog on Their Website Work?

I noticed they had a catalog and I was wondering what the point of the catalog is:/

Thanks!
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The items in the catalog are available for online purchase. They are generally in stock items. Louisvuitton.com has only been selling online for about 1 year. Before that, the only website selling online (authentic) was e-luxury.com
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Just to show you more stuff