Changelogs serve as a simple yet impactful tool for startups to communicate progress, align teams, and engage with users and investors by sharing updates about product changes and enhancements. Originating from software development practices, changelogs help maintain momentum in early-stage companies by regularly reminding teams of their progress and encouraging them to continue creating value. They play a crucial role in establishing a company's culture centered around execution and user feedback, while also acting as a marketing and recruitment tool by showcasing the company's commitment to quality and progress. Investors often track these updates to assess a startup's execution capabilities and the public response to new features, thus providing insight into the product's value. Effective changelogs should be scheduled regularly, highlight significant changes, and include engaging elements like screenshots or videos to make them more accessible and interesting to the audience.