What are the use of Sandboxed soultions in SharePoint?

Sandboxed solutions was introduced in SharePoint 2010 and this solution introduced by Microsoft specially for not to down the entire farm from any deployment on SharePoint. These solutions deployment targets the single site collection not the entire farm so that farm availability in production is high.

Sandboxed solutions was introduced in SharePoint 2010 and this solution introduced by Microsoft specially for not to down the entire farm from any deployment on SharePoint. These solutions deployment targets the single site collection not the entire farm so that farm availability in production is high.