What does this abbreviation mean?
German job offers often show "m/w/d" in the title. It's an abbreviation for "männlich, weiblich oder divers" — "male, female or diverse". This abbreviation means that the job offer is open to all genders, even if the job title is masculine.
Alternative abbreviations
The abbreviation is sometimes in a different order, like "d/w/m", to avoid putting men first and diverse people last1. Other letters like "a" (other), "t" (transsexual), "i" (intersexual), "gn" (gender neutral) and "x" (undefined) are sometimes used1.
Why is it everywhere?
Hiring discrimination based on gender is illegal. Companies add this information in their job offers to prevent discrimination lawsuits1. It does not guarantee that the employer cares about diversity.