Before get into the topic which should we discussing, you should know that, what is the purpose of doing Search engine optimization for website is getting high visibility from the search engines via optimizing and building popularity to the website. This is exactly known as Search engine optimization which is comes under digital marketing.
If you have plan to work for some companies as a SEO Consultant or Employee then there is not much scope for this job because this field is not only submitting a website to the search engines or directories. It is about understanding how your website rank into the top position of search engines as well as how your stuffs working in the right way. Most of the people have an idea about this one is, it is very easy job to handled and it very easy to get placement in different companies to get the job.
90% of the companies do not have idea about why they have hiring SEO, this is because of they just hire someone for performing optimization and do have an idea about this approach. This only so called professionals in this field should perform the few submission to the search engines and directories to the website. if you have plan to work as a SEO consultant for some corporate company then it is highly recommended that you should first get some experience in the field minimum up to 2-3 years and also continuously stay update on the new techniques as well as contributing discussion boards actively.
There is always huge scope in the industry as because of every web projects need traffic from the search engines, hence everyone looking for optimizing their content of the websites to rank in the top of search results. If you are looking the future of the industry means then you should not get worry about it, because it is growing in day by day and having positive trend. You just want to stick your work and then you will get success in the field.