Some standards focus on safety. Say that you want to buy your child a cycle helmet. Besides a good fit and fancy colours, you will certainly look out for a label confirming the helmet’s protective features that have been thoroughly tested by an accredited institute.
Other standards focus on collaboration. They are all around in everyday life, often without us giving it any thought. One of the earliest standards ever defined covers the width of railway tracks. If these were different from country to country, we wouldn’t be travelling far!