Elements are royalty free production sounds and loops for use in your score. You can drag these into your score canvas easily from the new Elements browser.
Elements are adaptive -- i.e they're aware of their tempo, key and content. For example, a drum loop will be aware that it's at a specific BPM, and that it doesn't contain pitched audio. Thus, Adaptive Audio won't try and pitch shift it when you change the key of your score later. But, it will change the speed.
To open the Elements Browser, tap the Elements icon in the toolbar.
You can search by keywords, or filter by instruments, collection (album, basically), or genre. You can also get quick access to any favourites you've made. At the bottom of the main Elements page, you can see some Recently Added elements.
To quickly preview an Element, just tap it's cover artwork - and tap again to stop the preview.
You can also quickly favourite an element or unfavourite it by swiping left on the Element in the Browser. Favourited Elements will show up in the favourites section of the Browser.
To use an Element in your score, drag and drop it onto the score canvas, either using touch or Pencil/Pen.