this is probably a stupid question, but... ive got this website that sells a product, there is no real need to update the content presented on the website itself since it says what i needs to say to sell the product. my question is do i need to keep updating it anyway so google wont lose interest in it? because the last months ive dropped a lot in rank. and if i do need to update it, what is the best way to do it with minimal interaction? i was thinking of creating a php script which keeps a database of articles optimized for the keyword i wanna rank for and then publishes a new every X days (where X is random) on the website.