Myth: Google likes sites that constantly add new content.
Not exactly true. Google likes website that regularly add quality content.

Myth: Getting as many backlinks as possible is the best way to advance in search result positioning.
Achieving a high number of relevant and authoritative backlinks will assist in advancing your site in search results. However, gaining links from every Tom, Dick and Harry site will not. In many cases, you will in fact be penalised for becoming associated with websites that have no relevance on your website’s content or low domain authority.

Myth: Overloading my page descriptions with keywords will improve my site.
Search engines do not use the keyphrases in Meta descriptions when they are ranking a website. The description is there solely to explain clearly and helpfully to web users what your page is about.

Myth: Adding numerous keywords to my website’s meta keywords tag will ensure I am found in search for all the keywords.
Search engines now ignore any content put into the keywords tag. The only use this now has is that it allows search engines to see those who are trying to out-smart its algorithms. You will be penalised for stuffing this tag full of keyphrases.

Myth: I have to submit my website to search engines in order to be found in search.
Google will find your site once you are live as long as it is indexable.

Myth: The more pages my site has, the better.
A search engine’s main focus is on quality content. If you are spreading your content over a large number of pages for no apparent reason other than to have more pages then this becomes diluted.

Myth: Paying for Google Adwords has a direct effect on organic ranking
The activity you engage in with paid search has no bearing whatsoever on where your website is situated in the organic search listings. Same vice versa.