Each filter controls how HTML markup will be saved and output when a user begins creating content that uses the text format filter.

Depending on how we choose to configure each text format, we can select different filters to enable. For example, the Basic HTML - Text format uses the Limit allowed HTML tags and correct faulty HTML filter, while the Plain text - Text format only uses the Display any HTML as plain text filter.
Depending on how restrictive or how loosely we want to control HTML will determine which filters we enable.