An executor is the person that carries out the terms that you have set up in your Will. In other words, you nominate an executor that will follow the instructions of your Last Will. Note that depending on your country, state or province, you may use the term personal representative instead. Certain countries or states may also have additional requirements. For instance, one of your executors may need to live in the same state or country as you.
Types of executors
There are many kinds of executors. A sole executor is someone who you nominate to carry out the terms of your Last Will alone.
The Co-Executors refers to two individuals who you nominate to carry out the terms of your Will together. The co-executors will have to work together so you may have to take that into consideration.
Alternate sole executor
An alternate sole executor is someone who carries out the terms of your Last Will if the executor(s) will not or is unable to. Note that you do not have to always name an alternate executor. If it's two individuals that alternatively carry out the terms of your Last Will, they are called alternate co-executors.
A digital executor carries out the terms of your Last Will that relate to your digital assets. Note that all the above categories of executors exist also for digital executors (digital sole executor or co-executors).
Finally, there different approaches you can take regarding the involvement of a probate court. You can specify in your Last Will if you do not wish that the probate court limits or supervises the executor. Such a person is an independent executor. If you do wish that the probate court limits or supervises them, then your executor will be dependent.