Update PULL_REQUEST_TEMPLATE.md

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,27 +1,31 @@
-## Before creating a pull request, please check if you have met all required steps
+# Before creating your Pull Request...
 
-**Is this a fix or an improvement?**
+- New Pull Requests should include a good description of what's being merged. 
+- Ideally, all Pull Requests are preceded by a discussion initiated in an Issue on this repository. 
+- For bug fixes is mandatory to have tests that cover and fail when the bug is present and will pass after this Pull Request.
+- For changes and improvements, new tests have to be provided to cover the new features.
+
+
+## What does this change implement/fix?
+
+... *answer here*
+
+## Is this a fix or an improvement?
 
 - [ ] Fix
 - [ ] Improvement
 
-**What does this change implement/fix?**
+## Have discussed this change in an issue?
-
-...
-
-
-**Have discussed this change in an issue?**
 
 - [ ] Yes
 - [ ] No
 
-**Was some test failing because of this issue or change needed?**
+## Was some test failing because of this issue or change needed?
 
 - [ ] Yes
 - [ ] No
 
-**Are you including tests to cover this change?**
+## Are you including tests to cover this change?
 
 - [ ] Yes
 - [ ] No
-