What is the purpose of the UAA codon?

Question

I want to know What is the purpose of the UAA codon.
( please, on a high school level)

Answer 1

It is an ending codon which signals the end of a code.

Answer 2

When you're building a protein, you have a 'start' codon (AUG) that tells the building mechanism to read each following 3-nucleotide group in order and snag the appropriate Amino Acid to add to the string. This goes on until the 'stop' codon (UAA, UAG or UGA) is reached; then the process stops.