If youre using android smartphone or any other smartphone, the chrome app is a must have. As you know it come directly from google it has all of the google specific benefits.
When you first open the app its automatically sign in with your existing google account on your android device. As the most popular browser and market leader, it has all of the amazing features in it.
On my smartphone, its the default browser, I am always using it for anything I wanted to search on the web. It has multi window feature like the desktop version of the chrome and also I am using the offline download feature a lot, so whenever I have no internet, I can able to read my favourite articles offline.
As I said, It is very fast on most of the smartphone with enough ram and memory, but its not so fast on lower end smartphones with less than 1gb of ram and less than 8gb of internal memory. In lower end phones, its lagging a lot and hangs the phone.
So I can say that its obviously the must have browser but if youre using a very low powered phone then use any other browser.