What is a "Good Tester"?

A good tester:

must be find the bug as soon as possible, and retest it.

must be able to understand the entire software development process.

A good tester is one who finds the bug as early as possible and make sure the bug is fixed. Good communication, writing and speaking skills especially English. Reporting, Analytical thinking, eye for detail, organizing, planning, and Logical thinking. Ability to understand technical terms, testing methodologies.