What are collections?
A quick breakdown:
A collection is the equivalent of a sheet on a spreadsheet.
Collections hold Datacards.
Datacards are the equivalent of a row on that sheet.
Each collection contains related Datacards. You can create collections in your dashboard, or by uploading your sheet on Silk.
If your Silk site is about a single subject, you just have to create one collection. For example, this Silk about restaurants just has a 'Restaurant' collection.
If your Silk site deals with multiple kinds of Datacards, you can create more than one collections. For instance, a Silk about a company knowledgebase, will have a collection for services, for team members, and for guides.