What's the difference between ステッカーラペル and シール? These three words all seem to have the meaning of sticker. How to distinguish them?

ステッカー(sticker), with self-adhesive labels on the back, most of which are printed with advertisements, slogans and slogans. For example, small advertisements posted on the wall can also be used to post parking tickets.

ラペル(label), a piece of paper used for advertising or logo, which does not necessarily have glue on the back, such as the price tag of goods in a supermarket.

Seal, decorative sticker, a piece of paper or a plastic label with patterns or characters. For example, cartoon stickers on clothes, plastic paper wrapped in beverage bottles, etc.