One of the strongest types of posts you can make on your blog or website in any format is about your product in the hands of your customer.
Before purchasing, all we want to know is how the product or service will be for us. The better we do at showing this to the customer, the easier the sale will be.
Case studies are one version of this. But expand your ideas. Write several posts or landing pages that are specific to customer usage. Make it as close as possible and your customer will feel much safer in their choice.