What is the superlative form of the adjective ‘good’?

The superlative form of the adjective 'good' is 'best'. In English, many adjectives form the superlative by adding 'est', but 'good' is an irregular adjective that uses entirely different words to express comparisons. 'Better' is the comparative form used when comparing two things, while 'best' is used when comparing more than two, or one against a group. This indicates the highest quality, degree, or extent. 'Goodest' and 'goodly' are not correct forms or commonly used.