Answer:
I think he may be a nut, but I'm not sure, there's little evidence of what he says to be true.
Boolean operators, it uses the word "and","or" and "not" with keywords to control the search. For example if you search for health and food, the search engine will give a narrow search focusing on the two keywords. Using "or" with keywords will give much broader results. Using a "not" will remove one keyword from the search, ex. windy not rainy will give results of the keyword windy only. An asterisk on the other hand, gives wider results with variations.
Answer:
These are company brand logo
Explanation:
These are company brand logo, and you will find it on all products of that company, plus generally you will find them on each page of their website as well as mobile application.
Pay attentions to what you are watching and or listening to.