search engine is a software program available through the internet that searches documents and files for keywords and returns the results of any files containing those keywords.
A title tag is a main factor of your webpage because, it's shows what's inside the page. Title tag is displayed in SERPs as a clickable headline for a given result, and are important for usability, SEO, and social sharing.
Sitemap is important because, it carries information about each page, including when it was created and last modified, and its importance relative to other pages on your site.
In On page SEO You have to make your URL user friendly, Title, Content, Meta description, Internal link, Image Alt tag, Sitemap.xml, Robots.txt these all activity should be in correct format to increase organic traffic.
Social Media will increase traffic to your site. There is a many social site like Facebook, Twitter, Instagram and Google+. You can do social media on these site and promote your business.