Thanks to EDENAHP i was able to understand the “difference” between B y STRONG in the HTML code. For me it’s always been the very same thing, until today.

The b etiquette places our text in bold only.

The strong etiquette tells our Internet navigator software (Firefox, Internet Explorer, Opera, etc…) that the text has to be highlighted. Attention, not bold but highlighted. It’s a mere casuality that today all the navigators understand or oversee bold texts as highlighted, but if a navigator one day wants to make a certain text “noticeable”, with the strong feature, it might be cursive for example and not bold.