I type a keyword :- Web Design Company result is out About 1,270,000,000 results (0.39 seconds) so its called traffic on a keyword or its data on web search by Google to related this keyword.
A search engine results page, or SERP, is the listing of web pages returned by a search engine in response to a keyword query.
it means that if I type any keyword which result shows by Google is result of pages or result of visitor search by these keyword ?
Yes it's data on Google listing related to this keyword. 0.39 seconds is the time which Google takes to display this data.
it is the total number of websites related to search query, roughly it is number of URL's with which one has to compet to get top rank on searched keyword
depending on particular topic in any search engine gives many results in some seconds its called search result.
This is Web Search Results related to the particular Word. I mean Google finds those results which contains that particular word "Website Design Company" - and 0.39seconds mean - Google took that much of time for showing those results. It is not correct dear - this is not the numbers of URL's - please make sure about your concept. I think you are somehow wrong.