I work in a shared office with 3 other people (described by my boss at the time as a "bullpen". Lots of chatter, people coming in and out, other employees coming in for whatever...it is definitely distracting.

My solution to this was to listen to "brown noise" on my over-ear headphones while I was in there trying to work. Then I remembered my ancient Gear Iconx Samsung bluetooth earbuds had built-in storage. I loaded a 20 loop of brown noise in there so I don't have to tether it to my phone all the time and I started using that.

It really does make a difference in terms of focusing and getting things done. Even random mumblings from my office mates, hallways conversations etc. don't distract me.