Hi and Welcome. My Name is ***** ***** I look forward to assisting you today with your question.
It seems like you have Do Not Disturb enabled on your iPad. Go to Settings and turn off Do Not Disturb option. Then press and hold down the Power button and Home button at the same time until it shows the Apple logo. When you see the Apple logo, release the buttons and let it boot. Check Safari.
Please let me know if that didn't work, so we can continue troubleshooting.