Depending on the context you need this text for, here are a few ways it is generally applied:
It is often used as a descriptive tag or category title in modeling portfolios or stock photo sites to help users filter for "mature" or "MILF" (Mom I'd Like to F***) aesthetics.
It serves as a SEO (Search Engine Optimization) keyword for websites like AnySmut to categorize galleries featuring mature women.
Users may use it as a self-descriptive hashtag or bio line to attract a specific audience interested in that body type and age range.
The phrase is a common search term used in online adult entertainment and photography circles to describe a specific demographic of women—typically those in their 30s or older with a larger bust size.