Hre you will find simple definitions to terms that seem to be misunderstood by the average person and occasionally the media. Each will include a link to a deeper dive with more nuance.
An Executive Order (EO) is a directive by the president of the United States. This ability is given to the president by Congress to allow for some discretionary power. Any EO is subject to judicial review.
A presidential pardon relieves the pardoned of one or more federal crimes, as per the text of the pardon.