Hi Suresh,

Split for Each : You have one flow, let's say Approval and you want to run this flow for all elements in Page list to assign to different approvers. So this shape will start multiple instances of same flow based on number of elements in Page list. You have to specify one flow name and page list name in configuration

Split Join : You want to start multiple flows ex. BackgroundCheck, EmploymentCheck etc. This is not based on a Page list, you need to specify all Flows to start in configuration

Hope this helps.