Is it possible to transfer music from my laptop to my iPhone without downloading software?

I recently got a digital copy of an album (if you're interested, the album was BADLANDS by Halsey) and I wanted to put it onto my phone's music. I've looked around and haven't found any ways to put music from the computer onto my iPhone's music app. I have iOS 8 on my phone and iTunes fully updated on my computer. Is it possible to put the music onto my phone without downloading tranfer software? If not, what's a safe transfer software? Thanks.

Added (1). The music is not on iTunes but in my music folder on my computer.

If on iTunes it will be synced in the cloud so you can sync it via iTunes. If not the you can move it to you iPhone.

1. Have your iTunes installed. Find the icon on left top corner, press it and go to add file to library. Add the music files in your computer.
2. Connect your iphone to your laptop and sync your music from computer to your iphone.