For a website to achieve success, there need to be visitors, and to get visitors, you need to advertise. Of course the cost of advertising can be overwhelming and brings no guarantee of sales.
Alternative to costly advertising
The advent of online social media has provided an alternative to costly advertising campaigns since there are 'real' people just hanging out to chat with others about anything, and that 'anything' can be presented via pages created at the social network ex: Facebook business or fan page, Facebook groups, Twitter page, Instagram images etc.
The most popular and effective audience interaction posts are puzzles, mathematical equations and trivia, and there are many which can be found at your fingertips... literally.
Simply use your preferred search engine to find 'puzzles and trivia', then pick from the list. It is best to post no more than 2 of these puzzles per week because the goal is to maximize the interaction of each post.
Subtly use the post to send users to your business website by inserting a link to your site for the answer to the puzzle, or offer a reward if they post the answer at your business website.
Post Socially With A Purpose
Your social network post should serve a valuable purpose other than satisfaction of seeing 'Likes'! The more you post at the social networks, is the more profit they gain. Get your share by following the rules of marketing, and post with destination links to your website.