When analyzing microbial health, what do 'richness' and 'evenness' specifically measure?

Answer

Richness refers to how many different types of species are present, and evenness refers to how equally abundant those species are

Scientists assess microbiome health by looking at richness, which quantifies the number of different species present, and evenness, which describes how equally distributed those species are in terms of abundance.

When analyzing microbial health, what do 'richness' and 'evenness' specifically measure?
healthGutorganismbacteriamicrobiome