When people search the Internet for your name, your LinkedIn profile will most likely be one of the top search results, so you want to make a great first impression.
Your LinkedIn profile also links people to other social media properties and websites where you can showcase your expertise.
This is the single most important part of your profile and will appear next to your name in the search results.
I recommend a headshot focusing on your smiling face.
Second, it's a violation of the LinkedIn end user license agreement.
To add your current and previous positions, click "add a position."