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

Adding to Sam's answer. Ids are helpful both for styling and javascript. If you want only a particular style applied or want to increase the specificity of your css id come handy.