If you don’t know what content to produce, here is a suggestion: CASE STUDIES.
1. Evidence beats opinion. Your clients speaking for you and confirming your claim with evidence is way more powerful than you bragging.
2. By asking your customers for case studies, you will learn very quickly why they will or won't give you a case study AND what you need to do to get better.
3. Focusing on becoming so good that customers would talk about your solution on camera will make your product better and better over time as your attention moves towards bringing value to your client ALWAYS.
4. And - if those points have not convinced you: Case studies are easy and cheap to produce. It doesn’t require any creative energy. All you need is a question catalogue and Zoom.