To create collections you need to use filters from the products page. In order to create and save filters please enter the desired specific information and click the blue filter button below. Then name your filter and your filter will be saved to Quick filters/Collections.
You can now use the saved quick filter/collection in setting up notifications or in dynamic pricing and calculating SmartPrices for that specific collection or selection of collections. Please refer to this article on how to calculate SmartPrice in detail.
Please take note that Shopify collections and Prisync collections are not the same. In order to use Shopify collections on Prisync, please use tags and other details to filter products and then save the filtered products as quick filters.