How to boost leads and organic traffic for business without paid Campaign ?

First, understanding SEM (search engine marketing) is key. SEM fully operates off of paid marketing campaigns that are desired by the client and output by the marketing specialist. SEM mostly goes hand in hand with PPC and CPC. SEO (search engine optimization) operates off of organic searches; meaning that if someone searches for, as an example, flowers, and your company sells flowers, your company's information will be in the list on Google if you have already been searched for specifically by others. As more and more people click on your link and go to your page, look around your page, and actually click around on the page (i.e. go to your About page, Products, etc.), the higher your website will be on the Google search page.

Another great way to obtain to boost traffic to your site is by implementing the use of Instagram, Facebook, WordPress Blog, LinkedIn, and Twitter to increase the visibility of your site on other platforms. The more you post on those social media sites, the more you'll increase your market. But you have to be careful and make sure that you're targeting the right market when you do this. Create profiles of your clients/customers. You need to ask yourself questions such as: Where are my clients from? How old are they? What are their spending/purchasing habits? What type of purchase power do they have (do they like to spend a lot of money or a little bit of money)?  These are great questions to ask and identify answers to when you're looking to build up your business credibility.

All of this, in turn, will boost traffic to your site.

Content Optimization

SEO on page or off page  

Video submission 

managing all technical things of SEO like , sitemap configuration , 404 page configuration ,robot .txt file 

canonical ,etc.