How to use Whatsapp Business and increase productivity

Whatsapp business rolled out In India and many countries. If you already have Whatsapp in your phone but want to enjoy business version you need a new number for registration.  But if you want registration with same number uninstall old app and then download and install new version from the Google App Store.
Check is yours whether you want to keep two different apps or just one. I gone with the second option.
Once app is installed you will get a verification code on your phone.  You can verify manually or allow app do it.
On the app screen on top right corner look for the three vertical dots...
Click on the vertical dots...
A drop down menu will appear.
Go to settings
Right your business name and upload photo. 
Business name cannot be changed later.  Put it carefully.
Next go to business setting menu.  Right a precise description so people know looking your business profile what product you have or what service you offer.
Set your business hours,  email id and websites.
Save data tapping save button on top of the web page.
In the setting section click on contacts tab and invite your business contacts from other channels.
Now you are set for doing business using whasapp business.
I started doing it already. I made one logo and send to one of my prospective client.  File size 1 MB.  And transfer was instant .
On a scale of 10 I would rate whatsapp business at 5.
What you say? Extend your opinions using comment box below.