If you have a business website you would like it to be on the first page of search result for your keyword. To help a search engine to find all of your pages you should have site map of your site in the root directory or links to all the pages in your index file.
Any product you buy will some or the other day stop functioning. If it is under guaranty (not warranty) there is not much problem as you get original parts from the manufacturer free but if not you are asked to pay for the parts.
