F

Fair Use
The stated exceptions of allowed usage of work under copyright without requiring permission of the
original copyright holder.

FAQ – Stands for “Frequently Asked Questions.”

Favicon

Favorites Icon is a small icon which appears next to URLs in a web browser.
Upload an image named favicon.ico in the root of your site to have your site associated with a favicon.
Favorites 

Feed

Many content management, systems such as blogs, allow readers to subscribe to content update
notifications via RSS or XML feeds. Feeds can also refer to pay per click syndicated feeds, or merchant 
product feeds. Merchant product feeds have become less effective as a means of content generation
due to improving duplicate content filters.

FFA

Free for all pages are pages which allow anyone to add a link to them. Generally these links do not
pull much weight in search relevancy algorithms because many automated programs fill these pages
with links pointing at low quality websites. A page or site with many outgoing links to unrelated websites, containing little if any unique content. Link farms are only intended for spiders, and have little if any value to human users,
and thus are ignored or penalized by the search engines.

Filter

Certain activities or signatures which make a page or site appear unnatural might make search
engines inclined to filter / remove them out of the search results. For example, if a site publishes significant duplicate content it may get a reduced crawl priority and get filtered out of the search results. Some search engines also have filters based on link quality, link growth rate, and anchor text. Some pages are also penalized for spamming. 

Firefox
Popular extensible open source web browser.

Flash

Vector graphics-based animation software which makes it easier to make websites look rich and
interactive in nature. Search engines tend to struggle indexing and ranking flash websites because flash typically contains so little relevant content. If you use flash ensure: you embed flash files within HTML pages you use a noembed element to describe what is in the flash you publish your flash content in multiple separate files such that you can embed appropriate flash files in relevant pages

Fresh Content
Content which is dynamic in nature and gives people a reason to keep paying attention to your
website. Many SEOs talk up fresh content, but fresh content does not generally mean re-editing old content. It more
often refers to creating new content. The primary advantages to fresh content are:
Maintain and grow mindshare: If you keep giving people a reason to pay attention to you more
and more people will pay attention to you, and link to your site.

Faster idea spreading: If many people pay attention to your site, when you come out with good
ideas they will spread quickly.
Growing archives: If you are a content producer then owning more content means you have more
chances to rank. If you keep building additional fresh content eventually that gives you a large catalog
of relevant content.
Frequent crawling: Frequently updated websites are more likely to be crawled frequently.

FTP

File Transfer Protocol is a protocol for transferring data between computers. Many content management systems (such as blogging platforms) include FTP capabilities. 

Fuzzy Search Search which will find matching terms when terms are misspelled (or fuzzy).  Fuzzy search technology is similar to stemming technology, with the exception that fuzzy search corrects the  misspellings at the users end and stemming searches for other versions of the same core word within the index.