The first row is the number of pages indexed by a selection of search engines. This tells you how many pages on the selected domain are indexed in each of the search engines listed. If no pages appear, then the domain has probably not been listed yet and it needs to be submitted to the search engines in the normal way. If you have selected search phrases, then results will appear for each phrase. The numbers under each search engine indicate the position in the search results of the first result from your domain.
Lower numbers are better, obviously.
Only the first 100 results from each engine are measured. If a page from your domain appears in the first 100 results, then you can link to a view of the page, that will give you more information. The green and red bars give an approximate order of magnitude measure of the popularity of a search phrase. These bars give a rough idea of which search phrases are worth working on. More green bars and fewer red bars are likely to indicate a good search term to target.