Welcome!
Acronyms are covered in this thread:
List of Common Gifted Acronyms.
Lots of information on tests can be found by searching these forums, the Davidson Database, Hoagies Gifted Education Page, and/or doing a web search for the specific test, subtest, and/or index.
Basically there are IQ tests, and achievement tests.
IQ tests consist of several subtests, and each subtest measures a component of intelligence.
If a professional asks what you want tested, they may be asking if you've observed signs which may cause you to suspect giftedness, learning disability, or giftedness plus learning disability (2e, twice exceptional).
Because you've specified, in your previous posts, wanting your seven-year-old to take the
SAT-10 test, a professional may also be asking why you want
that particular assessment instrument to be utilized. For example, are scores from that particular test to be used as entrance criteria or qualification for a specific program? Is it a test which your child has been prepped for? Might a different test instrument be administered which would still meet your goals for having your child tested?