Job description :

* Job description tells all about the tasks and responsibilities expected to be performed.

* Job description tells your what you must do when selected.

* The main purpose of job description to collect job-related data in order to advertise for a particular job.

Job specification :

* Job specification tells the level of experiences and skills that a candidate must have to be selected for the job.

*Job specification tells you what you must have to be selected for a job.

* It helps candidates analyze whether is are eligible to apply for a particular job vacancy or not.