CSS for table

Hi, I had created just a table alone in a page but it is not looking like a table. Can you tell what css should be added? Is it possible to add the required css in appearance tab or we should add in custom.css file? I had attached the screenshot for your reference. Please help me to solve the issue.  
1 answers

Please go the properties section of table and add style as Bordered. As per me, your problem will be solved with this.