Many people still don't know that they can edit the web address of their profile. Then they presented themselves with a profile at that looks like this: cz.linkedin.com/in/06543511680205 instead of edit it to cz.linkedin.com/in/name.
3. Too many skills
We all have a natural tendency to state the skills that we think should be stated for our profile to look good. We think that the more the better. But this is a mistake. Too many skills don't look good. Why e.g. to state that you know how to work with Microsoft Office when anyone can do it today? Rather present only some of your strongest skills.
4. Links to other sites
LinkedIn allows you to include links to your other websites, blogs or Twitter in your profile. Thus, visitors to your profile can expand the horizons of what you are doing and gain more confidence in you. Link to interesting projects you have worked on and to other materials that will support your credibility.
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Article source CustomerThink - US website focused on customer care