Mark Zuckerberg's Instagram year-in-review post, titled 'It's been a year!', mixed personal and professional highlights. The post featured family moments, including candid shots of his children and wife Priscilla, alongside corporate milestones. Key Meta initiatives like the Superintelligence launch and AI focus were likely referenced, interspersed with playful, themed outfits and collaborative moments with colleagues and personalities like Theo Von.