Who can speel weel?

Mispelt keywords can generate a fair wack of traffic for most sites, and if you examine your analytics you will discover that a majority of your customers cant spell your company name or product names... often many fail to use the space bar between words because they understand that google will self correct them....

there is another element of typo seo when you targeting the US market and having to swap "s" for "z" in words....

great article linked below on the topic, nice to see words of warning, use this with a small serve and only in moderation as google will offer suggested correct spelling.

another great moment is when your typo domain outranks your correctly spelt domain....

SE Guide