Not Understanding this node

Can anyone explain me how to use this node

I want to add new point for spline in between two points

This node adds a spline point to the end of the spline, try Add Spline Point At Index instead - see how it goes.

Sorry to ask like this I am new to this spline concepts can you please keep any sample screenshot like how to use this node. It is asking for both location and Point Strucked here

I don’t think I understand the question.

It is asking for both location and
Point

Splines are made out of points, each point has a coordinate and index, you provide both to insert a new spline point at index with the appropriate coord, for example:

Spline with 5 points:

We insert a new one at index 3, between existing spline points 2&3 and add bit in the Z axis to place it higher:

And you end up with this:

More about splines:

https://docs.unrealengine.com/en-US/Engine/BlueprintSplines/index.html

Also, it seems it was answered here already for you: