Problem: How do you identify what the keywords in a search term mean. A word like Shingles can mean shingles roof, or shingles disease or shingles concept in se

Problem: How do you identify what the keywords in a search term mean. A word like Shingles can mean shingles roof, or shingles disease or shingles concept in search engine. For this, you first start with a known set of documents (known means their type, whether business, science, sports, etc is known), and index them. For each word/phrase, you compute the proability that it belongs to a certain category. For example, when you see Shingles, you say 50% is disease, 40% is roofs and 10% is code. Depending on your understanding of the user, you will most probably present health related results at the top of SERP. Btw, its not my idea...I was just an employee!