Learn English – Word for inane words used for emphasis

"The most very best you will ever in the universe"
There's a word for the category of words such as the above, words that are used to emphasise something without adding any content by themselves.

Those words that are used a lot in marketing and in reviews to convey "wowing".

I can't find it.

Edit: In retrospect the question wasn't clear enough, and the word I was looking for (Superlative) isn't necessarily the correct answer to the question. But the answers to the original question are good, so I'm not changing it.
After rereading the question and the answers, I'd say that both Intensifier and Puffery are good answers to the question as-is.
I decided to mark Intensifier as the answer because it relates to the modifiers themselves rather than to the phrasing as a whole, and because it was interesting to read about it.