Learn essential curve techniques in Geometry Nodes for Blender in this comprehensive tutorial. Explore curve creation methods, mesh-to-curve conversion, curve primitives, and advanced operations like joining, filling, and filleting. Master curve manipulation with resampling, spline and handle types, and handle positioning. Discover how to convert curves to meshes, work with spline parameters, adjust radius and tilt, and utilize trimming techniques. Dive into instancing on curves, scaling with parameters, and applying random selections and rotations. Conclude with endpoint selection and point connection methods to enhance your 3D modeling skills.