I unfortunately have to use LinkedIn because I am self employed and it's one of the few ways to actually communicate with hiring managers and other people in corporations who are capable of hiring contractors.
The entire site is a cesspool and I hate using it.
I have noticed that nobody there has a personality. Nobody posts anything unique. Posts always end up in one of 4 categories, and never anything else.
The first category (and in my opinion the most insufferable one) are the corporate-begging posts. People will make posts like "so glad to be part of a great and wonderful team doing so much good for the diversity of our wonderful planet!" and the post will contain a picture of 10 people smiling, all wearing the same boring suit with the same boring hair style. These posts are designed for their boss to hit "like" so they will like them more and be likely to promote them, and when applying for jobs for their potential employer to see that they are a good worker and be more likely to hire them. If you're wanting a new job, fill your LinkedIn feed with these sorts of posts and you're more likely to get the job.
The second category are the dumb corporate memes or "observations". Things that are designed to make you go "yeah, you tell it!" while at the same time not rocking the boat enough to actually upset or offend anyone. People will post things like "Companies want us to get up at 8 and come in on time at 9, but the boss always comes in at midday". They are never directed at a company specifically, and are always vague enough to be applicable to anyone, so that nobody loses their job when their boss feels attacked. Worse, there's always some comment from a corporate-begger along the lines of "that's because bosses are busy forming connections and keeping the company growing, and are usually the last ones out the door!", which is always some pro-corporate "rebuttal". The purpose of these posts is to post something interesting enough that people will share, in order to grow your linkedin network and become more likely to get noticed by potential employers. The point of the rebuttals on these posts is to allow someone to gain that same network growth - their friends will see that they responded to the post and will thus share it including their response - while at the same time absolving any responsibility for the post, in case it does happen to go too far and cross a line somewhere. These are the riskiest posts on the platform, and the rarest, but they are potentially the most valuable because they can get people noticed and grow networks.
The third category is companies patting themselves on the back, or talking about how they are doing something new and innovative. They will write something like "This year we delivered more value to our customers than ever before, over 3000 new sales of our new WhizBang product in 3 weeks!", and the picture will be a graph or a stock image of a person at a service desk smiling. Or they will write something like "AI is taking over, and we are at the forefront of AI-developed eco-tools to develop value-chain solutions for businesses at scale" (the more buzzwords the better). These posts will always be accompanied by some generic, inoffensive but mildly interesting picture, like a robot arm or a castle or something, and they will always make sure the picture contains their logo or company name somewhere on it as a watermark, so that on the off chance they do post an image that might be remotely interesting, anyone else who uses it can't do so without advertising for them. The purpose of these posts is essentially PR, they exist as a way to advertise on the site without paying for advertising, and their hope is that enough people will be interested in their milquetoast achievement to share it.
Lastly, there are just outright scams. This is usually companies or individuals selling courses on "business management and value chain creation", or companies talking about how you should attend their conference on "Agile Data-Driven Infrastructure in a Modern Eco-Friendly world". These posts are designed to drive new business, but are more specific and direct than the above category. They aren't designed to drive customers to a business, they are instead designed to con businesses and business managers (the kinds of people who take LinkedIn seriously) into paying them to help their business achieve growth.