README.md in mainstreet-0.2.2 vs README.md in mainstreet-0.2.3

@@ -2,22 +2,24 @@
 
 Address verification for Ruby and Rails
 
 :earth_americas: Supports international addresses
 
-[![Build Status](https://travis-ci.org/ankane/mainstreet.svg?branch=master)](https://travis-ci.org/ankane/mainstreet)
+[![Build Status](https://github.com/ankane/mainstreet/workflows/build/badge.svg?branch=master)](https://github.com/ankane/mainstreet/actions)
 
 ## Installation
 
 Add this line to your application’s Gemfile:
 
 ```ruby
-gem 'mainstreet'
+gem "mainstreet"
 ```
 
-## Full Verification
+## How It Works
 
-By default, bad street numbers, units, and postal codes may pass verification. For full verification, get an account with [SmartyStreets](https://smartystreets.com). The free plan supports 250 lookups per month for US addresses, and plans for international addresses start at $7. To use it, set:
+MainStreet uses [Geocoder](https://github.com/alexreisner/geocoder) for address verification, which has a number of [3rd party services](https://github.com/alexreisner/geocoder/blob/master/README_API_GUIDE.md#global-street-address-lookups) you can use. If you adhere to GDPR, be sure to add the service to your subprocessor list.
+
+With some services, bad street numbers, units, and postal codes may pass verification. For full verification, get an account with [SmartyStreets](https://smartystreets.com). The free plan supports 250 lookups per month for US addresses, and plans for international addresses start at $7. To use it, set:
 
 ```ruby
 ENV["SMARTY_STREETS_AUTH_ID"] = "auth-id"
 ENV["SMARTY_STREETS_AUTH_TOKEN"] = "auth-token"
 ```