I used ArcGIS Pro 2.7 for this tutorial.
Basic examples in 2D and 3D of trend surfaces, IDW, spline with and without tension, and others:
00:22 Rasters - Interpolation
02:10 Trend Surface
06:49 Inverse Distance Weighting
11:53 Spline
15:08: Not interpolation. It's allocation: Thiessen Polygons
16:00 Natural Neighbour
