You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
When I develop a website, I build the backend and the front-end in tandem. I experiment on both sides together, and my ideas evolve. The site will slowly tend towards a good design (I hope!) via a series of bad designs en route. But it gets there with less total development time.
So while there are some excellent designers out there who produce beautiful, intuitive and empathetic designs, if that is their whole job (and I believe it's viable that it might be) then it does come at a cost. Someone who can design and code well is likely to be more expedient.
