Shutterfly and icloud

Hi, Donna.

Welcome to the Apple Support Communities. It sounds like you have some questions about uploading photos from your iPhone to Shutterfly. We can understand why you’d want more info. 

Check this out: Shutterfly for iPhone: Uploading Photos

If you have additional questions, reach out to Shuttterfly: Shutterfly Home

All the best. 

Make sure you library is designated the System Photo Library in Photo's General preference pane:

Then access the library via your browser as shown below: