What does "it was all publicity" mean in this context?

Question

“He was pleased,” said Fred.

“Didn't you hear him as we were leaving?

He was asking that bloke from the Daily Prophet if he'd be able to work the fight into his report — said it was all publicity.”

I'm not sure what the word publicity truly mean in this context. I got a list(see below) from the dictionary, but I don't know which one is fit for the context.

What does the whole sentence (it was all publicity) convey?

publicity (pʌˈblɪsɪtɪ) n

1. (Marketing)

   a. the technique or process of attracting public attention to people, products, etc, as by the use of the mass media

   b. (as modifier): a publicity agent.

2. (Marketing) public interest resulting from information supplied by such a technique or process

3. (Marketing) information used to draw public attention to people, products, etc

4. the state of being public

Answer 1

To say that something "was all publicity" usually means that the thing was done solely with the intention of obtaining publicity, that it was only an attempt to get into the public eye.

P.S. There's a saying that describes how it is for those whose success depends on their always being before the public eye: There's no such thing as bad publicity. For example, a "reality TV" mogul might make no distinction between fame and infamy; where there's notoriety, there's propriety.

Answer 2

We need more context when you ask these questions about Harry Potter. It seems to me that apparently there was some fight. One might expect a fight to carry some negative consequences for whatever institution this happened at. However, apparently "he" wasn't concerned about that at all; he thinks that the fight will simply be good publicity and nothing else.