Poor photo
Though LinkedIn is a professional network and not a dating site, your profile picture plays a huge role in how often people look at your profile and how they generally view your overall presence on this network. As The Muse states, the worst-case scenario is no picture at all. The second worst scenario is having an informal, unprofessional or low-quality profile picture.
Connection collection
Don't simply add all the people you know to your network. When it comes to LinkedIn connections, quality is much more important than quantity. Be selective with the people you connect with, consider whether any given person is from your field of business or a similar area. Users with hundreds of irrelevant contacts seem untrustworthy.
No concept
Being a passive user of LinkedIn will not bring you much. You need to be active and you should come up with a certain concept that will be attractive to other users. Are you working on a project? Are you learning the art of management? Each week you might share up-to-date information with photographs, and invite your contacts to comment.
Too many key words
Key words are part of the text that serves as an introduction, as well as the activities and skills you present in your profile. Many people try to squeeze in as many keywords as possible here in the belief that anyone doing a search will find them more easily. However, this is a mistake that will come across as a lack of professionalism and expertise.
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