“Why” is a wonderful way to start a question. Why invokes reasoning, so when I received this question from a client, I wanted to answer in a way that would help her realize why not to just make a laundry list of accomplishments.
“How” is the art.
And another concept: LinkedIn is not your resume. LinkedIn should complement your resume and fill in the gaps with your insight.
The real answer is: the reader will not appreciate the importance of accomplishments thorough a career without context and little perspective offered. Only you can provide that.
Choose the most salient milestones that demonstrate the height, width, depth, breadth of what you have done, do, and can do in the future. Select keywords to be found in the LinkedIn search for those attributes. Tell us what we need to know most, not everything to know, and especially, why we need to know it.
Remember, if you don’t tell us (worst case scenario), we will never know. But if you say too much we will leave and that’s another loss for you. Find the happy medium without undercutting your value and shortchanging your career narrative.
Never throw a list on the wall; more importantly, select the top stories we need to understand and then remember about you.
Bridge all the gaps. That’s the ticket.

