- Animations (e.g. banners sliding / fading)
- Drop down menus
- Error / Validation messages
- Slide shows
- Loading remote content (without forcing the entire page to reload).
Imagine this, you have a button on your home page that says "click here for further information". This button (when clicked) will activate a "popup" (or modal) window that loads additional content.
This is great for user experience (in that we are not overwhelming the user with info).
But will Google "follow" this and read this additional content (like a real person)?