Feature Stapling

Using Feature stapling, you can activate default/custom features when a new site/web will be created.

The requirement of feature stapling roots to the problem of having certain features automatically activated when a new site(through site definition) is created. So we have 2 options to do this types of requirements.

1)Modifying the site definition(onet.xml)(Not a good practice)

2)Feature stapling(Feature inside feature).

Feature stapling means its nothing but nested features.

To create a staple you actually create another Feature that does the staple.

Feature stapling is implemented through a Feature that is specifically designed to staple other Features to one or more site definitions. Feature stapling allows a Feature to be stapled to any new sites created from any site definition or from specific site definitions based on the template name identified in the appropriate WEBTEMP.xml file.