change motivation text

README.md

@@ -1,6 +1,8 @@
 # CSS Grid Annotator
 
-Automatically annotate [CSS Grid](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout) items with row and column positions, so they are correctly positioned in IE11.
+[CSS Grid](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Grid_Layout) is great, but IE11 assumes that all items are in the first row and first column.
+So, you have to add a lot of styles to explicitly position your grid items.
+This script automatically adds the positioning attributes for IE11.
 
 ![Demo: before, after](demo.gif)
 
@@ -17,7 +19,7 @@ Please check back under the releases tab for recent releases.
 - If there are more items/children specified than columns in the the template, new rows will be created.
 - If there any of the children is annotated with an explicit `-ms-grid-column` or `-ms-grid-row`, the whole container will be skipped.
 - Hidden elements are skipped (`type="hidden"` or `display: none`).
-- The script also annotates containers which are dynamically inserted via JavaScript. But, items are only annotated if a grid container is inserted, inserting individual items stay un-annotated.
+- The script also annotates containers which are dynamically inserted via JavaScript. But, items are only annotated if a grid container is inserted, inserting individual items stay unannotated.
 
 ## More to do