what do you do with a vector dots? and vector scale

[magic star]

?

[gentle summit]

Vector dot multiplies all subordinates of two vectors, then adds them all together.
Vector scale multiplies all values of a vector by the scalar.
You can think of Vector Scale as multiplying its magnitude.
You can think of Vector Dot as a chip that gets how similar two vectors are when both vectors are normalized.
Heres a visual explanation of Vector Dot and Vector Cross:
https://www.youtube.com/watch?v=h0NJK4mEIJU

[magic star]

So when should I use theses