Probate is a court process that takes place after a person dies. The purpose of the process is to legally transfer assets that are in the deceased person’s name to whomever the beneficiaries of the estate are. In Oregon, your estate will need to go through a probate process if you die owning real property with a market value worth over $200K, and/or if you own personal property worth over $75K. This applies even if you have a will. Your will simply tells the probate court where to direct your assets after you die.
Most people who don’t want their estate to go through probate set up a revocable living trust to hold their assets. That way, when they die (or if they are incapacitated), they don’t actually own any assets that need to be transferred—the trust does, and the trust agreement tells the trustee what to do with the assets.