What is the role of F in dict(E, **F)

[Alex]

Entering
Help on method_descriptor:

update(...)
D.update(E, **F) -> None. Update D from E and F: for k in E: D[k]
= E[k]
(if E has keys else: for (k, v) in E: D[k] = v) then: for k in F:
D[k] = F[k]

As I understand update() is used to merge two dictionaries, for example

But what is the role of **F?

Alex