Final answer:
Coverage is a term used in software testing to measure the percentage of program statements that have been executed by a test suite, referred to as statement coverage.
Step-by-step explanation:
The phrase you're referring to, 'coverage', is indeed used to measure the percentage of statements in a program that have been executed by at least one test case in the test set. This is known as statement coverage or line coverage. Ensuring high coverage of code is essential for validating the testing process and confirming that most parts of the codebase have been evaluated for correctness. Statement coverage is part of a suite of coverage criteria used in software testing, with others including branch coverage, function coverage, and path coverage. Its measurement is essential in identifying areas within the program that have not been tested, which may contain hidden bugs or errors.