Should we care about primate tool use?

Describe the types of tools created and used by primates (hint: in your description, be specific about distinct primate-specific and groups.)
-Under what conditions does primate tool use appear to emerge?
-Can the tool use by modern primates tell us anything about early hominids and their tool use?
-What makes the adoption of tool use by modern primates different and similar to that of hominins throughout evolutionary history?