AEM Static Template Vs Editable Template

Namastey, 

Templates are basis of AEM page. Author can create a page using a template . These templates define basic structure of the page, what components can be used on the page and design of the page.

With AEM 6.2 , Editable Templates were introduced to reduce dependency of authors on developers.

In AEM 6.3 Editable Templates are quite a mature and powerful feature.

AEM Static Templates 

• Static templates are created by developers ( It defines page rendering component , availability of template for authors to create the page ) 
• Stored in /apps directory of CRX
• Once a page is created using templates, after that if we make any change in static template it wouldn't affect the page.
• Design mode is available for applying Page design.

AEM Editable Templates

• Editable Templates can be created by template-authors ( non-developers ).
• Stored in /conf directory of CRX
• Pages created using editable templates would affect if any changes on editable templates are done.
• Page design is controlled by content and page policies.Hence no design mode available.

Dhanywad.