Migration of content from one website to another can be a daunting task. It can be done either manually or automated. Adobe Experience Manager is a popular CMS platform that is used by enterprises to migrate their content to. There are a number of steps involved in this automated migration of content to AEM.
This infographic explains the preliminary steps and ETL cycle involved in AEM content migration.
Infographic Source : http://www.tothenew.com/blog/infograph-fundamentals-of-migrating-content-to-aem/