What are the 2 types of recruiting and how do companies use job analysis in recruiting?

The two types of recruiting are internal and external.

Internal recruiting refers to recruiting applications from those who already work for the company. They are internal people eligible for the job, so they want to promote within.  External recruiting refers to advertising for the position. By advertising for this position they are looking for employee referrals, special events to advertise the position, online application sources and other ways to advertise for it. They use job analysis in recruiting to figure out the best way they should advertise for the position and who is a potential qualified candidate to apply for it.