Hi..
What is on page SEO...? I have no idea about it ...If anyone have any idea about it then please share with me.. Thanks in advance...

On page involves optimizing your website for on page factors to maximize its performance in search results.
On page factors include,
- Inclusion of fresh unique content
- Inclusion of well-researched keywords in appropriate density
- Inclusion of meta description tags, ALT tags, H1 tags
- Internal linking strategy
- Placement of anchor text
- Title optimization by placing target keyword in the title
- Inclusion of a sitemap
- Image and video optimization
- Page loading speed optimization
For a better understanding, refer to this SEO starter guide,
http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/en//webmasters/docs/search-engine-optimization-starter-guide.pdf

hi
any changes in the coding of the website , to increase the ranking is comes under On-Page optimization.

On page optimization is the technique to change a website Html code and content to make it search engine friendly.

Changes on the site to make it perfect for search engines you can do
1. Meta Tag optimization
2. Image Optimization
3. Hyper link optimization
4. Content Optimization
5. Robit.txt creation and Sitemap Generation

We need to do some changes in a website to make it perfect for search engines

On-page Optimization is all about improving the actual and visual performance of the website. Here, all the changes are applied on the website page in the search engine. It is mainly for optimizing the content of your website in the search engine and a step for making your site more friendly with the search engine. On-page Optimization includes Title and meta tag, Content Optimization, Keyword research and analysis, sitemap creation, Internal and external link structure, ALT attributes, Robots.txt and lots more. Hope the mention information becomes helpful to you.

 On page optimaization is the process of optimizing content to your web pages that's include heading tag, images, title, Description, keyword and links to your websites that is called On page optimization. You can follow these types of thing.

    1)Meta Title
    2)Meta Description
    3)Meta Keyword
    4)URl
    5)IMG Alt tag
    6)Keyword density
    7)H1 and H2 tag

HI
On page seo is done with in the page. If you want to go for on page then you must have knowledge of HTML. It includes meta keywords, meta description, Url and many more. It helps to increase the traffic of your page.

On page SEO is the process of optimizing the content of your website. This includes the text, images and links on your website. Anything uploaded to your site's domain is considered on page.

hi
to increase the ranking of the website, some changes are done in the coding like inserting tags and all, this comes under the On-Page optimization 

hi.
On page requires coding that is HTML and Xhtml. It is done within the page. It includes meta tags, meta keywords, meta description.

On page seo is done with in the page. If you wish to go for on page again you accept to accept ability of HTML. It includes meta keywords, meta description, Url and abounding more. It helps to access the cartage of your page.

On-page optimization basically deals with fine-tuning the contents in the website. This in turn will make the site rank high in the search engines.