i have a site with "almost similar but not the same content" about conversion. currently all traffics came from long tail keyword query such as: mysite.com/unitconversion.php?q=400 mysite.com/unitconversion.php?q=34 mysite.com/unitconversion.php?q=54 and thousand more results i understand that canonical is for similar or identical pages, but the conversion results on my pages are unique, but the wording of page are the same. I wish the page mysite.com/conversion.php to be more popular, but seems like nobody has visited the main page from search engine. What should i do? is canonical the best option?