The term classified advertising refers to advertising that is generally much cheaper than larger display advertisements. These types of ads are common in newspapers.

Display advertising is for everyone to see and it is displayed in such a way to get the maximum attention of the readers. Classified advertising is buried/shown on specific page and you go there if you are looking for something.

Companies that offer free Internet classified advertising can be found by doing research into the category. Almost every Internet classified advertisement agency requires some sort of payment.

Typically in case of newspaper classified ads are short and without any image/picture. Classified ads are charged by # of words or column length.

Normal or display advertising is long and has images/pictures and cost more. The objective of display advertising is brand awareness.

Online or internet classified ads don't suffer from newspaper space limitation and allow long description as well as images/pictures.

"Yes, one can post classified advertising online. One may use online classified listings like craigslist or the pennysaver. One may also use the website of various newspapers and take out a classified ad in that manner."