Search Engine Optimization (SEO) is incorporated in the SEM. It is a process that adjusts and changes the content of the website and its architecture such that it is ranked higher in the result pages of the search engines. There are tools available online to make your website or specific web pages search engine optimized. The generation of leads depends a lot on how many people your website can reach and Search Engine Marketing is the best way to achieve that.
In marketing, lead generation is the initiation of consumer interest or enquiry into products or services of a business. Leads can be created for purposes such as list building, e-newsletter list acquisition or for sales leads. The methods for generating leads typically fall under the umbrella of advertising, but may also include non-paid sources such as organic search engine results or referrals from existing customers.