Clicking the first option, to give feedback on a specific part of the page, presents a selector to choose the part of the page that the feedback applies to and after that a box to capture the feedback.
Alternatively to give feedback about the whole page or site, click the second option and enter the feedback.
And last of all, if these answers from @Anil Sagar, @wwitman and me have addressed your question please click the Accept link or alternatively let us know what further details we can help provide.