Search Engine Optimization is the method or process involved in taking your website to get ranking on the search engines to increase its visibility when users search for relevant keywords and queries in search engines .
Yes, your business should invest in SEO. Without page ranking your website will not be visible in search results. Search engine optimization offers is the way to increase organic traffic without paying for each and every click.
It depends on your SEO plan and how well you perform on many search engine optimization techniques and the industry competition. It takes time for a website to perform organically as Google ranks relevant sites that have built up authority.
If you have a website, consider it has an ongoing cost. Getting the page ranking is the first goal and after that maintaining the ranking is also important when there are millions of website released every day in the internet .
A business should balance multiple marketing channels to avoid a reliance on any single source of traffic (and conversions). Relaying on only SEO will get the organic traffic to your site but will take time. If you have budget to run both the results will be faster.