What's codon in mutation?

In the context of mutations, a codon is a sequence of three nucleotides in DNA or RNA that specifies a particular amino acid or signals the termination of translation. A mutation can alter a codon in several ways:

• Point Mutation: A change in a single nucleotide can change one codon to another, potentially leading to a different amino acid being incorporated into a protein (missense mutation), or it can result in a premature stop signal (nonsense mutation).
• Frameshift Mutation: The insertion or deletion of one or more nucleotides (not in multiples of three) can shift the reading frame of the codons, altering every amino acid sequence downstream of the mutation and often leading to a non-functional protein.