It is true. Everyone is unique in their own way. However, no one knows that these people are unique. People forget to mention their talents and why they are unique in their bio.
Many successful bloggers have a long bio. Those bios contain a lot of information about the blogger. These bios explain why the blogger is unique. A bio that expresses how unique the blogger is will allow that blogger to stand out from the crowd.
What makes you unique? What talent do you have that few people have? These are the questions that you have to answer in the bio of your blog, website, Twitter handle, or any other online presence that you have. Then you will be able to stand out from the crowd, and when you make yourself stand out from the crowd, you will get more visitors.