what does )))) mean at the end of a sentence and how can i use it?

I really don't understand why foreiginers don't understand it

At least we can use it to find our folk in random places of the internet)

Если коротко, чем больше у вас какой-то эмоции, тем более скобок нужно поставить.

боюсь представить как выразить скобками "я бесконечно счастлив"

If you don’t know what you’re doing use only one) for neutral smile. Because )) may be just a wide smile or may be a weird smile for being sarcastic, ironic and even passive aggressive. And the more ) you use the more sarcastic you are.