What is the difference between a push factor and a pull factor

Difference between 'push factor' and 'pull factor':

Push factor:

When a particular action or an incident triggers the idea of moving away from a place or entity, it is considered as the 'push factor'. Literally speaking, this factor causes issues that push an individual or a group of individuals out of one place to go and settle elsewhere. Weak or unjust leadership, regional economic instability, etc. work like push factors.  

Pull factor:

When the superiority of one region attracts an individual or a group of individuals towards itself, it is termed as the 'pull factor' of that particular region. Better earning opportunities, better environment, etc. turn out to be the pull factors in most cases.

The geographic feature in the westernmost corner of kenya is answer: the great rift vally