A Last Will’s witness is an individual that verifies the validity of your Last Will. In other words, this is a person that is present when you are signing your Last Will. They have to prove that by signing the same document in the presence of each other as well. In recent years this may also take place online in some areas.
Usually a Will needs signatures from two witnesses (three in some cases) to be valid. Note that the exact number of witnesses necessary for the Will to be considered valid may vary depending on National or State laws. Make sure you check your local or national legislation to be sure that your Last Will is valid.