Hi friends,
Kindly tell me that what is the meaning of Landing page and what are the effects of this in the promotion of website.
Thanks in advance.

Landing page is very first page user lands when he clicks on a website's URL.
Landing pages are critical to organic SEO as they strike the first impression on the user (brief insight of website).
Landing page optimization refers to practice of optimizing your landing pages so as to attract customers.
Here's few tips
-Keep your landing page focused and pretty simple (bullet points)
-Use a graphic element such as a big arrow to tell your prospect where to start.
-Don't go over with special effects
-Your company's privacy policy link should be prominently displayed
-The confirmation page is a great place to deepen the relationship with additional offers.
-Ask only for those fields which are reasonable(phone number, title, company)
-Don't repeat a particular phrase

 A landing page, sometimes called a destination page, is the web page that visitors arrive at after they click the link on a search engine results page. A landing page can be the first page of a website that was advertised on the search engine results page, or from one of the natural results from the search query. This page generally displays logical information, usually something that pertains directly to the keywords searched, or has the keywords directly on the page. This can be a transactional or a reference page as well. In pay per click and other paid inclusion campaigns the landing page is considered the place where "the deal is closed" which basically means that visitors decide on the landing page whether they are going to use the service of the web page or not.

A landing page refers to any Web page that a user arrives at after clicking a hyperlink. The definition of landing page has changed from being synonymous with a website's home page to referring to any page within a website that is linked to from another location on the Web. A landing page is usually a stable URL that is indexed by search engines, as opposed to a temporary splash or jump pages that are used to move traffic to a site for marketing purposes.

Landing Page is the web page that visitors arrive at after they click the link on a search engine results page. A landing page can be the first page of a website that was advertised on the search engine results page, or from one of the natural results from the search query.

Landing page are that pages on which we redirect our full traffic which comes for our website. means landing page is that page which we need more traffic to promote our website or website product.

Landing page is also known as Targeted Page. The page that arrives after submitting your site info and where anyone can see these submitted details are Landing or Targeted Pages.

Well, landing page is a page where visitor lands for the first time then they are redirected to money page!

I am using Unbounce for create and optimize landing page for my campaign. It is paid tool but you can try free version. They provides really good suggestions and support for creats effective landing page which converts to increase quality leads.