please explain vertex and edgein beginners intro

[hanscees]

Hi,
been trying to wrap my head around this intro page on igraph and python here

https://igraph.org/python/doc/tutorial/tutorial.htm

However I do not know what the explainer means with "vertex" and "edge".
A small text with accompanying graph for explanation would have helped me. Without these two concepts explained the rest of the intro is hard to follow.

The best explanation I found is on wikipedia:
https://en.m.wikipedia.org/wiki/Vertex_(graph_theory)

a vertex is a node. So speaking of vertex (node) clears it all up.

Just a tip from the formerly ignorant

thanks