Clinking Glasses emoji is the picture of two 👓 Glasses touching one another in a same common gesture which is depicted by 🍻 Clinking Beer Mugs emoji. The meaning of this emoji are just the same as the meanings of this action in real life — i.e. it may appear in the context of celebration of any type from weddings to proms, it may also be a symbol of congratulations on any success or achievement, especially when it belongs to the two people.
Examples of using
“We’re having our first anniversary! 🥂”
“Congratulations with your wedding! 🥂”