utf8mb4_unicode_ci vs utf8mb4_bin

Question

So first let\'s see if I get it right:

A charset is a set of symbols and encodings. A collation is a set of rules for comparing characters in a charset.

Answer 1

If for example I want to allow Case-insensitive search using utf8mb4_bin I will have to do things like:

Keep in mind that if you use LOWER it will ignore indexing