Search engines work according to the order of relevancy perceived by them to the search phrase requested and the higher your site seems relevant to the requested search, accordingly your site is going to be listed in results pages. It’s not all about just repetition of any key phrase, but far more than this. While writing website content, one should keep in mind that relevant and informative content is considered by visitors and search engines too. Moreover, each page should contain minimum four hundred words otherwise website is not considered by search engines and quite possible to be penalized also.
Quality web content is dispersed with relevant SEO keywords and phrases, so you should try to put some of the keywords and phrases on each webpage as well as make them relevant for the content of page. More than this, keyword density also matters a lot and it should be approximate 4 %, but keep in mind excessive use may cause your website penalize for spam by search engines. Placing ideal keyword density plays major role in search engine optimization of a website. If it is done in right way, within a short period, you will be bestowed with excellent results in ranking of search engines.
If you use headline tags (H1/H2/H3) for main headings and also put few of the keywords with these tags, it really makes a difference in SEO process because search engines always catch keywords in this perspective. Using bold and italics is a great help to let your Keywords and USPs picked out, but it should be used in right manner otherwise it can cause messy look to the web content. Regularly updated content gives you better results as well as another notable thing is posting of industry specific articles on news section and blogs on weekly or daily basis.