Here's why this is important:

* Genetic Code: Codons are the fundamental units of the genetic code. Each codon specifies a particular amino acid, which is the building block of proteins.

* Translation: During protein synthesis (translation), the codons in mRNA (messenger RNA) are read by ribosomes, and the corresponding amino acids are linked together to form a protein chain.

* Variety: There are 64 possible codons (4 bases x 4 bases x 4 bases = 64). This provides enough variation to code for the 20 amino acids needed to build proteins, with some redundancy (multiple codons can specify the same amino acid).

Let me know if you have any other questions about DNA or the genetic code!