Olive Helper
Alton Brown from Good Eats once said that the only single-purpose tool you should have in your kitchen is a fire extinguisher. Anything else, you can toss out of your drawer and cabinets. However, there are some uni-purpose tools that are actually quite helpful if you know how to use them.
The OP had no idea what this wooden utensil was or what it did. Internet answer-providers provided an answer to this age-old conundrum. This is what you call an olive helper. It basically retrieves olives from jars or cans without damaging them. Why not just use a regular fork instead?