Content Rejection

you should show us an example of rejected images.

You would have received a rejection reason for each image not accepted. Study those images carefully to deterrmine what improvements you can make either in your photography or your editing. If you are able to accept the constructive criticism, the Community would be happy to offer useful suggestions if you post a few of the rejected images. 

Content should be world-class, technically perfect, commercial photography, in subjects that people want to license for their commercial applications.

There are specific rejection reasons, so you should post one or two of your pictures here, so that we can take a look at them. In the meantime, I recommend that you take some time for studying the manual

If you are new to stock, you should consider these resources: https://helpx.adobe.com/stock/contributor/tutorials.html
Please read the contributor user manual for more information on Adobe stock contributions: https://helpx.adobe.com/stock/contributor/user-guide.html
See here for rejection reasons: https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
and especially quality and technical issues: https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html