If you are new to our site then we'll recommend to take a look at our start-up guide by clicking on this link: Getting started

Choose keywords in the vertical section in the right side og the page. 

You can add your keywords by clicking add keywords

You'll be given the opportunity to either add keywords manually or get keyword suggestions

If you wish to edit or delete some keywords, simply mark the keyword on your list, and click on the action button below your list - And now you'll be able to manage your keywords