Don't trust anyone who is called SEO agency, good SEO is done only by using good content, design and understanding how to make this information available to search engines. We are just designers with SEO knowledge.
Search engine marketing, or SEM, is a form of Internet marketing that seeks to promote websites by increasing their visibility in search engineresult pages (SERPs) through the use of search engine optimization, paid placement, contextual advertising, and paid inclusion.
Attempts to improve rankings in ways that are disapproved of by the search engines, or involve deception. One black hat technique uses text that is hidden, either as text colored similar to the background, in an invisible div, or positioned off screen. Another method gives a different page depending on whether the page is being requested by a human visitor or a search engine, a technique known as cloaking.
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