Meta-analysis is a statistical method used to collect data for analysis of multiple studies and summarized to provide the average effect of quantitative research to answer the question. The advantage is to increase the sample size by increasing the credibility of the conclusions address the research The results of the meta-analysis is the inconsistency of the same subject the results of several independent studies systematic, quantitative and comprehensive analysis. It is the quantitative literature review, based on the same subject the results of a number of independent research for the study, on the basis of strict design, use of appropriate statistical methods to study the system of multiple, objective, comprehensive quantitative analysis.

Meta description is always important, it will plays vital role in search engine result pages, meta tags describe particular page's information means what that page consist of...

Meta description helps to give pages information

Meta description helps to get information about the webpages to the visitors & search engine crawler

The meta description tag is intended to be a brief and concise summary of your page's content. Think of the Yahoo! directory. You see your site title followed by a brief description of your site or business. The meta description tag is designed to provide a brief description of your site which can be used by search engines or directories.

The meta description, you can control the text under the title of your site in SERP.So metatags describing its importance in the SERP.

Although the description meta tag is rarely mentioned in the guide search engine advertising, is important if you want to trust search engines to index your entire site using the links page. Moreover, as it involves a little more effort when you enter other tags.

Meta Description is one of the important parts of on page for a website. If a website has perfect title, meta description and meta keywords, then determinately a website will rank well over search engine.

Meta elements are the HTML or XHTML <meta … > element used to provide structured metadata about a Web page. Multiple elements are often used on the same page: the element is the same, but its attributes are different. Meta elements can be used to specify page description, keywords and any other metadata not provided through the other head elements and attributes.The meta element has two uses: either to emulate the use of the HTTP response header, or to embed additional metadata within the HTML document.With HTML up to and including HTML 4.01 and XHTML, there were four valid attributes: content, http-equiv, name and scheme. Under HTML 5 there are now five valid attributes: charset having been added. http-equiv is used to emulate the HTTP header. name to embed metadata. The value of the statement, in either case, is contained in the content attribute, which is the only required attribute unless charset is given. charset is used to indicate the character set of the document, and is available in HTML5.

The description meta tag appears under the title in search engine results. This basically tells the audience the summary page. Your meta description should always match Your first paragraph and should be words that are not more than 40.

One of the aggravating things about search engines is the way to use meta descriptions. Most of the picks only certain sections of your description. When your link appears in the search results, a description can be by analogy a little, if at all. Unfortunately, there isn't much you can do about it.