How to make sheet editable to others?

How to make sheet editable to others?

Hi,
 
I am new to Zoho Sheet. I created a sign up sheet for my group. I would like to have everyone in my group to be able to update the sheet. Many of them are not Zoho users. Do they need to create a Soho account to do update?
 
Does Soho provide a link to my sheet so that I can send it in an email? And allows whoever click on the link to update the sheet?
 
Thanks a lot.
 
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