Improve Git branch definition

Author: lauracs24

Wireframe/index.html

@@ -46,11 +46,11 @@ <h2>What is a wireframe?</h2>
           <img src="placeholder.svg" alt="" />
           <h2>What is a Git branch?</h2>
           <p>
-            A branch in Git is a separate version of a project where you can work on
-            changes without affecting the main code.
+            A Git branch lets you work on new changes safely without changing the main
+            project. You can make updates, and only add them to the main code when they
+            are ready.
           </p>
-          <a href="https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell">
-            Read more
+          <a href="https://www.w3schools.com/git/git_branch.asp">Read more</a>
           </a>
         </article>
       </section>