When trying to expose a new feature to a site I'm using a pop-up that explains the change. Similar to what Google is doing across their products. An example:
My question is if it is important to visually load the pop-up after the page finished loading, to form some sort of effect that notifies the user this isn't part of the page. I've noticed Google are doing this, but wasn't sure if this is important from a UX perspective, or if it's just how they implemented it from a technical POV.