心得 (xīn dé) is a noun meaning the insights or understanding you gain from experience, study, or practice — often written down as a summary or takeaway. It differs from 体会 (tǐ huì), which is a broader, more personal feeling of understanding from experience, and from 见识 (jiàn shi), which emphasizes breadth of knowledge gained through exposure. 心得 is typically used in formal or reflective contexts, like sharing work or learning insights.