Here are some examples of how "nationwide" can be used:
* Nationwide coverage: This could refer to a television network that broadcasts across the entire country or a mobile phone network that provides service in all parts of a nation.
* Nationwide campaign: This could refer to a political campaign that aims to reach voters in every state or a public awareness campaign that targets the entire population.
* Nationwide shortage: This could refer to a lack of a particular product or service that is affecting people in all parts of a country.
Essentially, "nationwide" emphasizes the scope and reach of something, indicating that it is not limited to a specific region or area.