grammar - Are there any rules on the positioning adverbs should take in a sentence?

When an adverb modifies a verb, you can usually put it either before, between, or after:

Adverb = 'often', verb = 'go'

Before:

Often, I go for long walks.

Between:

I often go for long walks.

End:

I go for long walks often.

These aren't all equally common; you would probably find the between position used the most.

In your example, you are asking a question, so the 'before' position can't really be used.

Broadly, ever wish you could share information?

Just doesn't work.

But the between and end position are equally valid. I would say that, again, the between position sounds best.

Ever wish you could broadly share information?

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