Google is best follow formula 0 to 1.google launch chrome, playstore, adsent, gmail, orcut, maps, earth, gboard, drive, dropbox, email, translate, google book, google photo .more so on continue.
No doubt if you are using internet google take your money anyhow.let start why we use gmail or why is neccessary in your life.today world is digit so definetly if you are educated person or if you can see my comment right now, you know very well.almost every one create gmail account when they not to sent anybody but only for requrment for exam if you are a student you need gmail to fill the form, if you want to entertentment like fb, twitter, or any apps need gmail to login.ofcourse for mail, send documnet, send photo, chat, now a day if you watch or login youtube need gmail.for any govenment form gmail is one of the neccesry or in bank also to link you gmail account, if you buy new set need gmail account to verified your phone or open google apps hope to upcoming year every where need gmail, may be for your identification by gmail, get job by gmail, buy online by gmail, or many more.so google is bright future because they focus in R& D.that it