What is the use of com.atlassian.confluence.pages.actions and how to use it?

I have requirement like wait for page to load and add current date time on top of the page or I can also put the same date time during page save. Is com.atlassian.confluence.pages.actions will come in use for it?
If yes then how?
If no then how can I do that?

Here I want to let you know that I don’t want to use blueprint/template for this purpose.