search engine marketing

[frank]

what is the main point of search engine marketing, please share some informative tips ?

The main Objective of Search Engine Marketing is to bring organic targeted traffic to your site using SEO, SMO, Content Marketing and other search engine marketing elements, generating leads out of them and finally getting good conversions.

Thanks, i agree, but paid ads are beneficial or not, please explain it ?

Of-course the paid ads are beneficial. If they were not then no one should have spend their money in it.
In the case of paid advertising you are directly targeting those customers who are really interested, causing much more engagement & conversions of course.