A LinkedIn lock happens when LinkedIn places a temporary restriction on your account due to activity that might appear suspicious. This can include actions like sending too many connection requests in a short period, messaging users too rapidly, or accessing your account from multiple locations or devices simultaneously.

To minimize the risk of a LinkedIn lock, make sure to adhere to usage limits, avoid sudden spikes in activity, and maintain a consistent login pattern. If your account does become locked, LinkedIn usually provides instructions to verify your identity and regain access.