Its just a place for you to post your stories or blog posts, i think it is also a good way to promote somethings in your posts, but don't do too much, it will become an advertising story then not good.
LinkedIn Stories allows users and brand pages to share images and short videos of their professional moments. Stories can boost your content somewhere you know people will see it and help you build relationships with followers.
If you're in a B2B industry then LinkedIn stories are a great way to focus your efforts. Short videos and images can go a long way, so add this to your marketing strategy and post as often as possible.
It's great for companies looking to hire the best talent and show off how great it is to work for them. It's good for reaching your target audience if you're selling services to other companies. It will definitely boost your content and get it in front of other people rather quickly.