Being a dirty immigrant, I've always had difficulty understanding acronyms in the English language, as it was not part of my cultural upbringing, so there is no implied understanding of it when I encounter a new one. While some of those like NASA, SCUBA and RADAR have become so widely known that most people would not even think of them as anything other than actual words or names, there is a cultural tendency to want to shorten everything down to a few letters.
This is especially the case online, in forums, comments sections and now starting to bleed into written pieces that are meant to be polished for a wide audience. BRB, TTYL, ICYMI, TL;DR, WFH, NSFW and many others have become the bane of my existence, as I constantly have to google what they mean and cannot remember them from our last encounter for the life of me.
While this could be a problem that only I have, it's not the case. They are shortcuts that can be very useful in very narrow applications as a way to communicate faster, but that implies that all the people that are part of the conversation share that common language. When writing for the general public, you have to assume that at least a significant portion of your readers will not have any idea what your acronyms mean.
Spelling out a few extra words really doesn't take that much more work and it helps you communicate more effectively your ideas. If you must use acronyms, the best way to go about it is to spell out the full expression first and then write the acronym (or initialism if it's just random unpronounceable letters) in brackets, e.g. "Too Long, Didn't Read (TLDR)". This one is especially ironic because it's used by "busy" people who can't be bothered to do anything, neither read something or spell out in words that they don't want to read that something. Hilarious.
Elon Musk famously banned them from internal communications at SpaceX, because he believes they're a source of confusion for anyone but the most deeply expert people on a particular topic and it creates silos that dilute the effectiveness of communications across large organizations or groups of people. It's the language equivalent of having a ramp to make a building wheelchair accessible and then condemning the ramp to force people to take the stairs at their own peril.
There is a reason languages exist and have evolved over millennia to facilitate communications. Let's not pretend that we can be smarter than all our forebears because we can't bother spelling out four words in full or worse, make your writing redundant, defeating the purpose of the acronym altogether.
Your employee and your clients will thank you.