They are usually part of a section where companies or individuals can publish ads, often for a fee, and are organized by categories to facilitate the search (real estate, automobiles, jobs, computers, personal relationships, etc.).
Each ad consists of a brief description and contact information; sometimes it includes the value of the product. There are even publications dedicated to classified ads in a specific category, usually for housing, automobiles or second-hand items.
On the Internet
With the advent of the Internet, digital techniques have developed and professionalized, relegating the print media to a secondary role in classified ads. The vast majority of these digital publications are free of charge for users because they have lower infrastructure maintenance costs than print media.
On the Internet, classified ads have acquired a new perspective, people who were previously forced to pay to publish their classified ads in the print media, now opt for this new alternative, which in most cases is free of charge.
Search for jobs on Craigslist portals
Craigslist portals are characterized by very specific job offers. Do not expect to find on seokminko.com job offers for bank manager, just as it is very likely that if you are looking for a job as a doctor you will not find a job offer on seokminko.com. What you will find on both portals will be hundreds of offers to work as a waiter, offers for store clerk and the like.
In fact, for certain types of jobs, the job boards are the place where you will find the most job offers. For example, if you are looking for babysitting or housekeeping jobs, the classifieds portals have the most job offers of this type.