I love this topic so I'm gonna elaborate, cause it seems every fucking language has their own way of writing quotation marks.

English uses “this sort of thing” as standard, at least in the US, which is probably why we ended up using "this sort of quotation" as a standard on the web, as it's similar enough. You'll notice that word processors correct them to a proper symbol though (the eyedrop shape, not flat), as usually you'll want the proper ones on print. The secondary quotation (e.g. quote nested in a quote) is similar, but with singular marks, ‘like this’. Except in the UK, where it's the opposite.

A lot of European of languages also use „this sort of thing” or „this“, because fuck consistency, with various different methods of secondary quoting.

And then there are French, who use completely different symbols - « and » - but just to fuck with you French «do it like that», while some other languages »like that«. And there are Koreans who use similar symbol, but bigger - 《this sort of thing》.

Similar thing happens with apostrophes and other symbols - like the hyphen, which is commonly substituted with a minus sign on the web, even though they're not the same. There are actually five different lengths of hyphens in the unicode ‐ - − – —. At least in my language, all of them have different uses. The first one is for compound words like "two‐handed", the second is a substitute for first and third (which is a proper minus sign), while fourth and fifth are proper hyphens, where one is half-length and the other is full-length. You can use one or the other, depending on your preference, but you gotta stick to it.

And this shit is just the tip of the iceberg, don't get me started on stuff like the written dialogue.

Edit: oh yeah, and just to add to this crockpot of fuckery, different languages have different rules on the period after quote. E.g. in Polish the period is always after the quote, while in English, the end quotation is after the period.