SEO is one of the most cost-effective ways to gain traffic to your website. By optimizing each page in your store, you can increase your search engine ranking and find customers who are more likely to buy your products.
SEO involves researching keywords or phrases. Today, SEO focuses much more on context, and you are unlikely to be successful by just the same keyword or phrase all over your site. Instead, you need to create quality, engaging, unique content that tells a story. More people are using long-tail key phrases in searches. For example, people no longer just type in "shoes" if they are looking to buy shoes online. Instead, they type in something more specific, like "sale on black heels with a red bottom sole." This means your keyword/phrase strategy needs to be well planned, well researched, and implemented carefully as to avoid any "black hat SEO" techniques like keyword stuffing or other other strategies that could be considered unethical. Remember, SEO is affordable if you put the right strategy in place. Write for intent, not keywords related to your products and use them in URLs, page titles, meta descriptions and throughout the page content. Each page should be optimized for its own set of keywords. You can do keyword research using a tool like Google's Adwords and the Moz keyword difficulty tool. You can also Google search the keyword/phrase and look at their recommendations in the "did you mean?" section. Another option is to use relevant keywords in image file names and alt tags. Consider going after long-tail keywords, which are often less competitive and more specific to your unique products.