How to use Facebook application to posts make friends or create business and promotes

I use (Social media like) Facebook application and I use it on Smart phone and PC.

Simply Download Facebook application for free using google play store

Select Facebook application from your smart phone
Just need to Login to application using your valid gmail account or your phone number for verification purpose

after login you can create your profile by providing your profile picture, user name which makes more comfortable for your friends, family and others to find you.

Using Facebook application you can post picture, locations, videos and lots more which can be an entertainment or to create social awareness, you can post your daily life activities as well...

Using Facebook you can make your own friends circle which will include older, younger, your age or kids to be as your friends

You can drop messages, place phone call, video call to friends on your list...
Like your friends posts and comment on that and tag someone who relates to that....

Using of Facebook to maintain a good relationship with others who identify with certain products. As a business, you can sell or promote a product/service to a highly targeted audience, and increasing the possibilities of making money on the internet.

Though Facebook have some drawbacks like

Facebook can be addicted, Fake profiles, Fake people and ID can stalk you and get your personal details by using Facebook.