an amino acid is a chemical sub-unit of a protein, and ultimately everything that happens in a cell it produces some kind of protein, so you can see that erm the triplet  or  produces erm  which is one of the, one of the er   amino acids and so on and there are also punctuation marks u a a or u a g means stop, as does u g a, so when, when a r n a template running through a  gets to a sequence which reads, where was it now, u a a it stops reading because it knows it's got to the end of the gene.