Latent Semantic Indexing (LSI) is a system used by Google and other major search engines (Update: read here, thanks for the Tweets, guys).
The contents of a webpage are crawled by a search engine and the most common words and phrases are collated and identified as the keywords for the page.
SEO is the practice of improving and promoting a website to increase the number of visitors the site receives from search engines. There are many aspects to SEO, from the words on your page to the way other sites link to you on the web.
To promote a business there are various techniques like
1. Embrace social media
2. digital marketing
3. SEO
4. SMO
5. Email Marketing
6. Press releases
7. Use the three big local listing services
8. Start a blog Put up multimedia on YouTube and Flickr
9. Join a relevant online community and...