Learn the linear algebra you need to know for AI/ML. This covers the dot product both algorithmically and visually and applies it to machine learning embeddings. This article also contains visualizations and two interactive playgrounds, the Interactive Dot Product Playground [0] and the Interactive Embedding Explorer [1] (best viewed with laptop or desktop!) to reinforce the concepts that are taught.
[0] https://www.trybackprop.com/blog/linalg101/part_2_dot_produc...
[1] https://www.trybackprop.com/blog/linalg101/part_2_dot_produc...