How do I find out what a blueprint node is by looking at it?

[Pertrosfoliea]

Hi, I’m new to blueprints. I would like to use the node pictured here, but I don’t know what it’s called. Is there a place that lists nodes visually, or any other tips for solving such a problem?

[Raildex]

Unfortunately, There’s no “List” of all available nodes, only the documentation

Unreal Engine Blueprint API Reference

In your example. this node is a relational operator. BP has the same operators like c++.
See here, what relational operators do:

Operators in C++