Third - pursuing the next placement within an purchasing or series; "a distant 3rd"; "he answered the initial question willingly, the next reluctantly, and the third with resentment" SEO stands for Search Engine Optimization. It’s a system that can help your web site rank increased in internet search engine results. https://podcasts.apple.com/us/podcast/a-courseinmiracles-acim-podcast/id1456963067