What are the common mistakes when share STL 3D models?

Common mistakes when sharing STL 3D models are not optimizing file size, skipping geometry checks, and omitting key metadata—all of which can ruin usability or printing. Large files slow downloads or hit platform limits, making your model hard to access. Unchecked models often have broken faces or non-manifold edges, leading to failed prints. Missing details like scale, origin, or material notes leave recipients confused. Fix this with free tools (e.g., Meshmixer) to reduce size and repair geometry, plus a short text file with key info—this ensures others can use your model easily.