Each asset has a 'verification status'. It's important for you to know if your asset uploaded successfully and where it got during the so called validation process. Validation simply means somebody looks at your upload, and checks it for quality or possible mistakes. Here's a list explaining what all possible statuses mean.
Your asset got stuck during upload. Probably, your file was too large or your connection too slow or interrupting. If you have repeated issues, please contact us and let us know, it might be a bug.
Your asset uploaded successfully. Yay! If it's public, it's awaiting validation. If it's private, use it!
Your asset needs some (usually smaller) fixes, so we can make it public for everybody. Please check your email to see the feedback that we send to every creator personally.
This means the asset has serious quality issues, and it's probable that it might be good to start all over again or try with something simpler. You also get personal feedback into your e-mail, since we believe that together, we can all learn to become awesome 3D artists.
This status can be only set by you when you delete the asset from the add-on or from your website profile