When you are logged in, you have the ability to QUICK MESSAGE the people/profiles you are looking at. This could be simply to say hello or to inquire about a job or it could be to communicate with a school or recruiter about the status of your application. In some cases, you may not wish to have any further communication with a person. If this is the case, you can block the user. This will effectively REMOVE the QUICK MESSAGE opportunity for that person to contact you.
When you are in your profile, if you click on the BLOCKING TAB, you will see all the people you have blocked.
When blocking a user, please note that you will first click BLOCK and then you will be prompted to continue, click continue and then the user will be blocked.
