No - we also provide ongoing optimisation services, search rank reporting, and joined-up advice regarding web usability, mobile/tablet/desktop compatability, responsive design, & conversion optimisation, with a side helping of Google Analytics & Search Console familiarisation for (mainly) local clients.
SEO (Search Engine Optimisation) can be viewed as actions taken aimed at increasing the number of total unique and relevant visitors to your website who find their way there by carrying out a search in a Search Engine (e.g. Google, Yahoo, Bing).
If you have a website that is currently not providing your business with everything that you want in terms of customers and/or turnover, then SEO is most certainly worth considering, assuming you have budget available.
Not straight away. If the SEO work has been done properly then you are likely to see a gradual decline over many months, unless you are in a position to continue carrying out the nuts and bolts of the work – however things do change in the SEO world so you may gradually drop behind if you're not continuing to benefit from the detailed knowledge and analytical skills of an SEO specialist.
(v Places, PPC, Shopping, Images, Video etc)
Google (and other search engines') results pages contain results from a variety of sources. Organic results (typically 10 a page) are organised by the analytical algorithms that the search engine employs, and do not cost the website owner anything once somebody clicks on a result. Improving a website's positioning for the key-phrases that are relevant (i.e. people are likely to search for) to their business is referred to as Search Engine Optimisation. Typically the majority of visitors (sometimes as high as 95%) to your site will find it through organic results.