The correct answer is "It should be refreshed periodically to keep customers coming back"
Information on a website should always be up to date and relevant. You can always go back in and change what you wrote so that isn't a problem. Also grammatical errors are a problem because people think less of a site when the creator of it obviously can't or doesn't care to write grammatically. Websites should never be limited to text as pictures videos and so on make it more visually appealing and interesting.
I hope this helps u!
Have a great day! :)