An ideal place to start would be with content marketing. Creating your first 100 pieces of content. Content that helps pull in prospective customers and educates, informs or entertains them. All the whilst informing them of your value proposition.
Content marketing will help pull in prospective customers to your website. Where they can quickly sign up if they’re interested. A free trial, demo, or entry level version will greatly help with conversions. As it reduces the barriers to trying the product.
Whilst it is easy to get started, it takes work to do it well and at scale. Which is where analytics can really help, providing a feedback loop on what is engaging customers. Enabling SAAS companies to fine tune their content to meet the customer where they are.