In this modern world, website are essentials. Have you wondered what if you have to read some article or use some web application while you are moving in train or bus and you have no internet? What if you provide this feature to your user? Answer is : This will be a great user experience to them.
What if your user doesn’t have to download your website content each time they visit? Don’t you think this experience will be much far faster than before? Again answer is YES in capital letters.