Emojis generally replace the period but come after a question mark or exclamation point.

Can I borrow your pen? 😊

I borrowed your pen 😅

You little shit! 👿

After… I’ve said what I have to say, now I’m making a face at you. See?

After. It’s a visual commentary on the text you just wrote. It’s not part of that text.

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I treat them as a separate element to the text, and as such aren’t really part of the punctuation or grammar, so I try to keep any at the end of the entire message to convey the actual expression I had making it. 😉

👏Around👏everything👏.👏

I just treat them like the floating pics in a word documentation. So ba👌sically anywhere.

Great question. 🤔

IMO, they generally replace a period, comma or exclamation when used. In the cases where it’s a necessary question mark or something like that, I’d put the emoji after👍

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Before (unless intended otherwise). Imagine the case in which the paragraph continues…

Roy fell when we were walking. 😂 It was kind of worrying.

vs

Roy fell when we were walking 😂. It was kind of worrying.

In the first one, it seems that you are laughing about the fall being worrying. In the second, the laugh is about Roy, and then the next sentence reads in a more neutral tone, which was my intent.

Maybe it doesn’t look as nice, but to me it makes more sense.

Should not be placed

Never, is the appropriate answer.

If one is going to use emojis, it is contextual.

An emoji is roughly equivalent to body language, facial expressions, and/or audible cues. They should be inserted wherever the intended action would occur.

An example: man, I laughed my ass off. 🤣

Would be acceptable, but: man, I laughed my ass off🤣. would be better because the laughter is integral to the sentence.

However; man, I laughed 🤣 my ass off. would also be acceptable because it is being used to demonstrate the action.

Something like: cats make my heart happy. 💓 😊

Would need it to be outside the sentence because it reinforces the message instead of being part of the message.

Emojis can be the equivalent of hand movements in a way, so where they get placed is about where you would place a gesture.

Before :). Otherwise I am getting angry ಠ_ಠ. Smilies add context to the current statement. So a smilie afterwards just catches the overall vibe. 😌🤓😌 And this may be rude to someone. 🙄