
Explanation/Reference:
Explanation:
* A Data View is a live, customizable view of a data source from a SharePoint site.
* A new Column type "Related Items" has been Introduced in SharePoint 2013. This is a very useful column from Business prospective. After you Create an Item you can simply add a reference to another Item or a document in any List\Library as a related entity to this Item using Related Items column.
* Using web parts, you can modify the content, appearance, and behavior of pages of a SharePoint site by using a browser. Web parts are server-side controls that run inside a web part page: they're the building blocks of pages that appear on a SharePoint site.
* SharePoint lists and libraries contain list forms that allow users to display, edit, and add items to a list or library.
* In a custom list form, you can show or hide certain fields, reorganize those fields, change the layout of the form, add formatted text and graphics, and ultimately, change the XSL, HTML, or ASP used by the form. You can only perform these tasks by creating a custom list form in SharePoint Designer.
Reference: Customize Data Views and forms using SharePoint Designer
https://support.office.com/en-us/article/Customize-Data-Views-and-forms-using-SharePoint-Designer-
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