I don't know that your "niche keyword" ? but my "niche keyword" just done follow below list. when google index my page. go to first page's google result without offpage
1 The Meta Keywords, Description and Robots tag - Google used description copy to market your site in its results, treat this as optimized sales copy. Make sure your sitemap.xml page is CONSTANTLY called up to the search engines
2 The Title Tag – The MOST important aspect of on-page SEO, just take our word for it.
3 The Body Text (focus on the body text in bold, for this denotes strong emphasis to the search engines)
4 The first sentence in the body text and the first words used per sentence are the most important ones for advanced on-page SEO necessities (Make it humanly readable and SE readable — The words used in the first sentence are most important due to the implementation of Google’s LSI algorithm)
5 The URL — The subdirectory folder and page of content should be SEO’d (i.e.
http://domain.com/real-estate/...eal-estate-marketing-ideas.com 
would fetch a high ranking for a page dedicated to real estate marketing ideas – especially with many highly authoritative, relevant, deep in-bound links)
6 The H1 and H2 Texts are highly important – Why? They show the search engine the main subjects and Table of Contents for the content to be indexed. Make these keyword friendly and reflective of your page’s title tag.
7 Same Site Link Texts — The links connecting the pages of your site together must have your targeted keyword terms in them as well as all links throughout the site — even though it seems excessive, having variations to your targetted keywords would also help when linking out to other pages within your site.
8 Same-Site Link URLs — Not only should you be using your keywords to describe pages within your site, those URLs you link to must have SEO URLs ( eg:
http://domain.com/your-keyword.html )
9 Outbound Link Text — Resources you link to must be SEO’d – If you are an internet marketing site and are linking to an email marketing company (email marketing software in this instance), you would use “Put your internet marketing on auto-pilot and use the best tool for internet marketers today – internet marketing email software. Then just use other variants to internet marketing.
X IMG Alt Tags — Your images should be described via ALT Tags with the keywords you are optimizing for – If your image is hosted on your web-host, the file name of the images should also be SEO’d — If you have an image about polar bears have it be polar-bear.jpg in your images folder.
XI Keyword Density — 8% is excellent and doesn’t seem spammy, if you have a 500 word article, then 40 of those words should have variances of the search term you are targeting, if this seems excessive, lower the keyword density down to 5% and you will only need to add 25 variances/instances of your keyword. And that’s just a start… (Keyword prominence is big, but not worth a discussion).
XII Lastly and surprisingly, Your HTML comments should have your SEO terms in them (!!) — As a question to the relevancy this has to your ranking, I am unsure, but most of the large sites have html comments connected to their search terms. If you end up doing an analysis of your on-page content, you can find out if the high ranked sites for your keyword use HTML comments tagged to the keyword(s) being targeted.
Thank for content : backhatworld.com
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