The post that stands out is not the loudest one. It is the one only your shop could have made. When everybody near you is posting the same thing in the same way, the way to be seen is to do the opposite.
The marketer Seth Godin put it simply: a business is either remarkable or invisible, and a brown cow in a field of brown cows gets ignored (Seth Godin, Purple Cow). On any busy day, most feeds fill with the same idea copied over and over. That sameness is the brown cow. The post people actually stop on is the one that breaks the pattern.
Bonfire Night is the clearest example. Every café, pub and shop posts the same photo of fireworks. It is pretty, and it is invisible, because it looks like everyone else’s. The post that works is the one only your trade can make: the pub showing the warm bit between the cold and the display, the baker showing the parkin coming out of the oven, the chip shop showing the queue after the display ends. You can see this on the Bonfire Night run-up. Make the thing only you can make, not the thing everyone is making.
The same trick works on the noisiest sales days. On Boxing Day every feed is a wall of red SALE signs. The brand strategist Marty Neumeier has a rule for exactly this: when everyone zigs, zag (Marty Neumeier, Zag). The boldest move in a sea of shouting is to be quiet and human, a plain thank-you, a photo of you having a day off, a kind word with nothing to sell. You can see this on the Boxing Day run-up: the shop brave enough to be gentle is the one that gets noticed, because it is the only one not shouting.
So before you post, ask two questions. First, is everyone else already posting this? If yes, think again. Second, could any shop have posted this, or only mine? If any shop could, it will not stand out. The answer is almost always to go more specific and more you: your face, your work, your street, your regulars, your way of doing it.
This does not mean being strange for the sake of it. Standing out is not about gimmicks. It is about being unmistakably yourself when everyone else is being the same. Your shop already has things no rival has: the people, the place, the little habits, the story of why you started. Those are the raw material for a post nobody can copy.
Take a pub on St Patrick’s Day. Every pub for miles posts the same green pint. The one that stands out posts the landlord who has pulled pints there for thirty years, or the regular who has sat on the same stool since before the others opened. Nobody else can post that, because nobody else has it, and that is exactly why it gets seen.
It also helps to be plain. In a feed full of polished, samey adverts, an honest photo with a straight line under it stands out precisely because it is real. You do not need a designer. You need to show something true that only you have.
Here is the short version. Do not copy the crowd. When you notice everyone posting the same thing, that is your cue to do the opposite, or to go so specific to your own shop that copying is impossible. The plain, human, unmistakably-yours post is the one that gets seen.
The hard part is spotting your own angle when you are busy and the obvious idea is right there. Open What should I post?, tell it what is going on and what makes your shop different, and it gives you back a caption and the words for your picture that sound like you and not like everyone else.