An authentic bio is vital to break through the generic content by unqualified authors. Authentic authors care about the topic, they know the audience, and they have the courage to put their real name on their work.

• Start with a compelling first sentence that grabs the attention of your ideal reader. Write who you are, and why you care.
• An authentic bio also shows ownership: Include details that prove you're invested enough in the topic to write about it. 

Showing your credibility is essential.

• To help you not to come off as arrogant, write in the third person. "He is" instead of "I am."
• Focus on achievements, not titles, degrees, or years of experience. 
• Use concrete facts, not vague terms like "expert" or "industry leader." This can be done by showing the results you've gotten for customers, putting the spotlight on them while revealing your expertise.
• It's better to focus on subject matter expertise rather than your credentials.

Bios often show their friendliness by stringing together various hobbies in their last sentence. For example, "when they're not writing, you can find them hiking or drinking coffee".

There are better ways to be approachable:

• Go all-in on an unexpected skill or interest outside your work.
• Share how you use your work expertise in your personal life.

Wrap up the bio with a single next step for the reader to take. "To get in touch, follow him on LinkedIn." or "View all posts by Benny Lewis."

• Run it by colleagues or potential clients.
• Test different versions and track what generates the best results.
• Read your bio from your reader's perspective and ask what would catch your eye.