Whatsapp ek instant masseging app hai.facebook ke bad agr koi massenger itna popular hua to wo whatsapp hai.september 2015 me whatsaap ke 900 millians user ho gye hai.whatsapp ko january 2010 me release kiya gya tha jiske founder Jan Koum Brian Acton hai.
what is whatsapp?
 whatsapp ek masseging app h jisase aap world me kisi ko v massege send kr sakte h.whatsapp se aap image,audio aur video file v send kr sakte h.whatsaap ka sabse best feature jise whatsapp ne jald hi lauch kiya wo voice calling feature h. whatsaap se app world me kahi pr kisi ko v free call kr sakte h shart h ki aapka mobile internet se connect hona chahiye.
whatsapp last seen kya hai?
last seen ye btata h ki aapke whatsaap contact ka koi v user pichhli bar kb online tha .ye feature aap facebook me v dekh sakte h.
agr aap chahte h ki koi v whatsapp user ye na dekh paye ki aapne pichhli bar kb whatsaap open kiya tha to aapko whatsapp last seen ko disable krna hoga.

Step-1
sabse pahle apna whatsapp account open krke setting pr click kre setting option open ho jayega .

setting me aap account ka option dekh sakte h.
account pr click kre .

Step-2
account pr click krne k bad privacy ka option dikhega us pr click kre.privacy open ho jayegi.

Step-3 
 
 privacy me aapko last seen ka option milega us pr click kre .
Step-4
yha pr aap three option dekh sakte h.agr aap chahte h ki aapka last seen aapke whatsaap contact member hi dekh sake to my contact pr click kre .
agr aap chahte h ki aapke last seen ko koi v n dekh sake to aap Nobody ke option ko select kre aapka last seen hide ho jayega .
ek jaruri bat mai aapko bta du ki agr aap apna last seen hide krte h to aap apne kisi v contact ke last seen ko nhi dekh payenge agr aap apne whatsaap contact ke last seen ko dekhna chahte h to aapko v apna last seen enable krna hoga.