Pathfinder Bestiary HLO - what does it do?

[xmiyux]

I see the Bestiary is available for sale - but since HLO focuses on character sheets I am unsure what benefit there would be to buy it.

Does it unlock a way to easily search it and pull up the stat blocks for monster? Or let me flag some for easy access when creating encounters for a session? Or something else?

I don't mind buying it if I knew what it would allow me to do as a GM prepping sessions.