Connections and Follows
Connections are members who connect on LinkedIn because you both know and trust each other. If you're connected to someone, you'll both be able to see each other's shares and updates on your LinkedIn feed. You can also send messages to your connections on LinkedIn. Following someone on LinkedIn allows you to see the person's posts and articles on your homepage without being connected to them. However, the person you’re following won't see your posts. By default, you will follow your 1st degree connections, and you can always unfollow them.
You can reach a larger audience by encouraging others to follow your activity and read what you're sharing on LinkedIn, without adding 1st degree connections to your network.
Connect with people who have Follow as a primary action
When you send an invitation to connect with someone whose primary action is Follow, you will immediately start following that person while you await their response. Even if the person denies your request to connect, you will still follow their posts, unless you manually unfollow them.