In SharePoint, it often helps to know the basics of how things are structured, and what the standard syntax of URLs is.
I’m pretty sure everybody who is using SharePoint has sent a link to a document in a Document Library to somebody else (in an email message for example). So you probably know that links to documents (or list items) can become pretty long if the document is located in a Document Library on a site deeply buried in a hierarchy.
Many times I’ve been asked to adjust the NewForm.aspx (add record) experience for users to display a custom message after submit. A “Thank You” page for a survey is a great example. Other times in request forms people want to show a confirmation or instructions page. Thankfully the SharePoint product team made this easy for us developers.