The PostSecret meme draws inspiration from Frank Warren's PostSecret project, which started in 2005 as an anonymous community art project where people mailed decorated postcards revealing their secrets. On the internet, the aesthetic transitioned into a meme format used to share relatable, heartbreaking, or hilariously specific internal thoughts. Unlike high-energy reaction memes, the PostSecret template focuses on vulnerability and minimalism, often featuring artistic backgrounds with simple, impactful text. It is widely used on platforms like Tumblr and Instagram to express sentiments that are usually kept hidden, turning private vulnerability into a shared digital experience.