why use id's & class's in html why not just one?

Question

i understand what there is a difference between id\'s and class\'s - ids and ment to be given to a unique item, and class\'s and like tags, they can be given to multiple ite

Answer 1

Imagine if you had a load of buttons that looked the same on the page. Would you want to repeat yourself numerous times in your CSS? Or use a class and write it once.

This is applicable in any case of the same styling on different elements.