SEO—short for search engine optimization—is about helping search engines understand your content, and helping users find your site and make a decision about whether they should visit your site through a search engine. Search engine optimization is the process of improving the quality and quantity of website traffic to a website or a web page from search engines. SEO targets unpaid traffic rather than direct traffic or paid traffic.
Source: https://central.xero.com/s/question/0D58V00009Pk2H4SAJ/livecht-v-e-n-m-o-payment-declined