Gmail predicts which emails might be of high importance to you so it marks them as important with a yellow icon. If your inbox ends up full of so called important emails, this is how you disable this feature.
In the 21st century historians have increasingly portrayed the decade as a "pivot of change" in world history focusing especially on the political and economic upheavals. Check your 70s knowledge.
Who doesn't like a pizza. We will make a dough from scratch, prepare the tomato puree and with one step after another make one the best homemade Pizza Margherita you have ever tasted.