Why Should You Do SEO on a site?

Quite simply SEO should be done on a website because it improves your websites ranking in the SERPs (Search Engine Results Pages). Basically meaning where you show in the page when people search for something in a search engine. By getting better SERP rankings your site will get more traffic and thusly you will earn more money. So it's all about the money at the end of the day. That's the only reason people really do SEO on a website so they can rank it higher and earn some money with it. Unless they're doing it for fun. Yes they do that too.

When a site has a good ranking in the search list you will see that the user that issued the search has a tendency to click on your link. That is the main gist why SEO work is needed on a site to push the ranking upwards and for the link to appear not only on page 1 but on a higher position in page 1. If there are hundreds of users that do a search in an hour then you can imagine the amount of traffic that your site will get from the users who are searching.

You will get your website better ranked in search engines. Which is the main goal if you want to have organic traffic (from search engines).

I think what SEO stands for basically gives you the biggest reason to perform SEO on a website and that is that you're optimizing your website to be found in search engines which really is exactly what you want for any website you own.

You really can't beat organic traffic.

onpage seo,it must,like unique content,keyword,meta,tag..for best result in search engine...

Hi,
When we build a website. We've set a goal.
Good SEO activity helps to to get head start.

SEO activity should always brings value to general webvisitors i.e connect with other humans. It’s to maintain friendships, and foster internet based relationships.

The main purpose of doing SEO is to increase the website’s ranking in the search engine list. If you search for the category of your website and you find the link of your website on the search engine’s page 1 then that means you are doing good with the SEO capabilities of your website. And having a high rank can give your website new traffic that can come from the users of the search engines.