A more thorough explanation:

An optional writ is a type of legal document that is not required by law, but may be used in certain situations to help resolve a dispute or issue. It is similar to a regular writ, but is not mandatory.

For example, in some cases, a party may choose to file an optional writ to request a judge to review a decision made by a lower court. This writ is not required by law, but may be used to help the party get a fair outcome.

Another example of an optional writ is a writ of certiorari, which is used to request that a higher court review a decision made by a lower court. This writ is not required, but may be used to help ensure that the lower court's decision was fair and just.

Overall, an optional writ is a tool that can be used in certain legal situations to help parties get a fair outcome. While it is not required by law, it may be a useful option to consider.