[b]How to put your keyword in top[/b]

[trilok]

both are important to increase your website's popularity but in terms of search result i'll say seo is good over smo.
smo used to increase traffic on your site but seo used to optimize your site for search results.
on page and off page activities you can do but you need concentrate on Onpage activities more as google will crawl your site and the content in it and the main thing is to have an effective, good and unique content on your website.