The very first thing, a website or a Mobile App is not for Business Owners, it is a facility from them to their probable customers
Here Technical SEO, Content SEO, Mobile SEO and On Page SEO are the part of web development process. If during web development process, these things have been correctly managed and addressed according to the set of rules defined for web development process, 60% of the SEO of the website has been completed.
A Web development company like RAYS and TARANG, always keeps it in mind during web development process of any website. Here web development becomes bit costly but the results are amazing.
OFF Page, Local SEO & International SEO and Ecommerce SEO is the part of post web development and gives positive results only if above mentioned SEO practices were religiously followed during web development process. Otherwise, results will not be good.
Here one more thing is there, OFF page SEO is very costly and if the agency, does not have a sound knowledge of Google Algorithm and without understanding the defined rules, instead of boosting, Google may penalize the website.
It is because if just for getting Backlinks, black hat technique was used, Google will immediately restrict the website to be displayed in the search results.