Basically, it all depends on how well you plan your search engine optimization strategy. But yes, for a wordpress based website you can also use a variety of SEO plugins, which are quite effective and may boost your website’s ranking. For example; All in one SEO Pack, SEO Ultimate and WordPress SEO by Yoast.
Apart from all this, I would like you to give importance to your website’s content, sitemap, keywords, navigation, inbound and outbound links, image optimization, meta tags such as description, title tag, robot.txt. And to know why all these factors are important in deciding your website’s rank on google or any other search engine, you can refer the link in source as it is quite informative and covers almost all things that I want you to put stress on.
In addition to this While making inbound links, always prefer to take it from legitimate websites or else your website may even get penalized for unnatural links (if you have any).