How to capture webpages' keywords with WORD CLOUD visualization

Hi community,

I would like to use PBI to capture company's media press release and figure out the key phases/words that appreared most. That could be deem as key topics we need to focus. 

I checked that WORD CLOUD chart can display keywords, but needs processed key words and its frequency, and my questions is:

1. how can I grab data in different web pages?

2. how to make PBI identify key words from sentences?

3. are there any charts can realize the same but smarter?

Many thanks.