Nearly nine out of ten adverts on job portals fail to adhere to minimum Advertising Standards Agency (ASA) requirements, according to the Citizens Advice Bureau (CAB).
The advice charity warns that 88% of these adverts are wasting the time of thousands of job seekers struggling to find employment.
Vague job adverts are omitting vital information about wages and hours, says the CAB.
This leaves job seekers unable to determine whether a job will pay well enough to put food on the table and settle household bills.
Poor information could increase the likelihood of unsuitable applicants and risk putting people off from applying.