About the app: - Basically WhatsApp is an app through which we can make messages with our friend and relatives. This app is more private then the Facebook or any other social media app.How it works: - If you want to use WhatsApp in your mobile phone then you need to install it. This app is available on Google Play Store. you can install it from there. After installation you need to be a register hair using mobile number and OTP verification. Which number you used to register in WhatsApp this number is your WhatsApp number. You can also connect your email ID with WhatsApp. We can also give a good profile picture in our profile.Features of WhatsApp: - 1) chatting option: you can chat with your friends or relatives using warehouse number. We can send pictures, gifts, files, videos, using chatting option. 2) calling option: can you make call with our friends and relatives using WhatsApp number in online. This optiona is very useful when you have no balance in your phone but you have data balance then you can call your friend using data balance. 3) video calling option: we can make video call with our friends and relative using WhatsApp. This video calling option is very good. 4) status: if you have a good morality then you can use this as your WhatsApp status. You can make any picture video as you WhatsApp status. Every status will remain for 24 hours only. 5) groups: where we can create groups with group names. We can create more than one group. Where every groups content some members. Using this group chatting we can chat together with group members.This group chatting is more useful for students, service man, and any other person.6) voice messaging option: there was it’s very good another option is voice messaging option. Using this option we can gift voice messages .My opinion: - Whats app is a good video calling and messaging app. I use WhatsApp and this is very useful for me. Because of we can make video call using this app with my family members and relatives. And this is more private than the any other social media. So I recommend everyone to use this app. The only problem is some fake news are viral on there. We need to be aware about this kinds of news.