diff --git a/README.md b/README.md
index a21dc08..a1a44e1 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,20 @@ cypress __headless mode__ (cypress run):
 
 `npm run cypress run --env device=web`
 
+# Information
 
+Tests are located in `cypress/integration` folder
+
+Configuration files:
+1. cypress.json
+2. plugins/index.js
+
+Custom commands (shortcuts) are located in support folder (`.cmd.js` suffix)
+
+Why mobile view is in config and not in test (like cy.viewport())?
+- we can't change userAgent in the middle of the test:
+https://github.com/cypress-io/cypress/issues/2100
+So it seems more correct to launch the tests with the correct config (--env device=mob/web)
 
 
 # __Following best practices__