In website marketing, just small tweaks can make a huge difference in the visibility of your site on search engines. One of the first things to check is the setup of your robots.txt file. This essentially tells google what pages are on your site, and allows it to crawl the website properly. If your robots file is not setup correctly, you may find that your site is not easily crawled or indexed by Google.
Another key thing to check is that your heading tags are used properly. The H1 tag is the most important on the page, and should feature your keywords to ensure google knows your page is relevant to that keyword. Your heading should be easy to understand from a human and from a search engine perspective for best optimisation.