Why?

Hi @Images Basic,

There is no one-size fits all answer here. 

Adobe Stock customers expect highest visual and technical quality for use in million dollar commercial campaigns.  See links below.

• https://helpx.adobe.com/stock/contributor/help/reasons-for-content-rejection.html
• https://helpx.adobe.com/stock/contributor/help/quality-and-technical-issues.html

Various factors may apply.

• What kind of camera and lighting equipment do you have?
• How much formal training have you received?
• How much photography experience do you have?
• How much post editing have done?

For many people, what they need is professional training and a few year's experience as a commercial photographer. 

Hi @Images Basic , 

We need to see the rejected picture to tell you what to do to make it acceptable.

In the mean time read all the information at https://helpx.adobe.com/support/stock-contributor.html.

Best wishes

JG