On Page Optimization:

On Page Optimization means the web development of your site. In On-page optimization depnds the quality of sites. It is realted with basi html, perfect css or use of java script and php.
Basicully Search Engine's crawler loves freash and quality content so if we use quality freash or new and quality or usable content in web site it'll help 99% to improve our site's traffic and ranking in search engine.

There are some tags and attributes that we should maintain or watch on the time of creating on page optimization. These are mentioned below:

Title tag: Title tag should be mentioned in the head tag of a html page. It'll show the title of a web site or web page on the browser. It helps the Search Engines to understand the type of web site. It also helps to viewer to understand the web site.
It looks like below
<title>Your web site Title</title>

Meta Tag: It also should be mentioned within the head tag of a html page. Through Meta tag we can define a description of the web site or web page. We also can define the keywords in the Meta tag.
It looks like below
<meta name="Description" content="Your description of the web page">
<meta name="Keywords" content="Your keywords of the web page">

Head line tags: Head line tags are used for mention a head line of a paragraph. There are six types of head line tags, <h1> to <h6>.
<h1> is the biggest heading of a paragraph and <h6> is the smallest.
If you find the source page of http://linkbuildingservice4seo.com you can find the head line tags.

Scripts tags: If there is any need to use script in web site then the script code should be use within the head tag. It also helps the search engine that what type of scrip is being using in the web site.

Alt Attributes: It basically uses in the image tag. It helps the search engine to know an image's information.