recruitment advertisement; job ad; help-wanted ad
Refers to a public notice seeking applicants for employment, such as a newspaper ad, online posting, or flyer.
I applied after seeing a recruitment advertisement in the newspaper.
The company posted a job ad on its website.
募集広告 covers any kind of recruitment ad (volunteers, members, etc.), whereas 求人広告 is used specifically for paid job openings.
Compound of 募集 (ぼしゅう, 'recruitment') and 広告 (こうこく, 'advertisement').