Copypasta is a term that is generally hard to explain to people who aren’t that familiar with internet culture or aren’t native English speakers because the term doesn’t really have a solid meaning. A copypasta is just any text that is commonly repeated by people on the internet but is too complex to be manually typed out and thus requires the use of the copy and paste feature. Copypastas are typically inflammatory, egregious, confusing, overly verbose, and medium to long in word count. Copypastas are typically employed in an attempt to elicit laughter from the recipient by being absurd and unpredictable. A copypasta, when used on reddit, is not normally found to be entirely related to the discussion at hand. Usually a copypasta has just enough relevance to draw a vague connection to the original subject matter, but not enough relevance to make any actual sense. For example, if someone posted a clip of themselves dying in an embarrassing way, someone might copy and paste the entire wikipedia page for Cock and Ball Torture. The two have basically no connection other than the fact that dying in an embarrassing way and CBT both involve intense emotions. Basically, you use a copypasta whenever you feel like it. There are many more situations in which you might employ a copypasta, but I can’t cover them all. Another popular use for copypasta, and one of my favorites, is when you are involved in an argument with someone online and you don’t really feel like continuing the conversation, so instead of replying seriously to someone you instead use a copypasta that is overly aggressive and excessive, calling the recipient many insults and proclaiming that you are going to beat their ass, etc. Hope this wall of text helps.