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Whenever webmaster or blogger search for something in Google you only see what ranks. You don't see the hundreds or thousands of pages that have been filtered for pushing too hard.
If you are in the dark on what density levels are reasonable, consider patterning your perspective after what is working right now.
1. search for your target keyword in Google
2. grab 5 of the top ranked pages from the search results
3. analyze each of them in a separate tab using this tool
Always remember that some extremely trusted brands rank more based on their brand validity and strength than the on-page content, thus if you are creating content for a newer & less-trusted website you would likely be better off putting more weight on results from smaller & lesser-known websites which still managed to rank well in Google.
Mention a keyword or phrase too many times and search engines will likely frown at your site. Do it a little less than necessary and search engines may not pick up enough signals to rank the page for that particular keyword.
Keyword Density Checker tool to help webmasters analyses the keyword density from their web pages and include a tag or word cloud for simple appears of the most significant keywords from your website. This tool solves that problem perfectly. It allows you to analyze either a whole web page using its URL or a piece of text by copying and pasting.
Keyword density checker is the calculation in percentage from the number of times a keyword or phrase appears compared to the total number of words on a webpage. The simplest method of calculating keyword density is usually to divide the number of times a particular keyword is mentioned in a text by the total number of words in the text and then multiply the result by one hundred to get your percentage.
There is no single optimal or universal keyword density percentage. Each search query is unique & search engines compare (or normalize) documents against other top documents to determine some of their specific thresholds. Some keywords like credit cards" naturally appear as a two-word phrase, whereas other terms may be more spread out. Further, some highly trusted websites with great awareness, strong usage data & robust link profiles can likely get away with more repetition than smaller, less trusted sites can.
As a general rule-of-thumb, when it comes to keyword frequency...
1. From a trusted corpus of internal content (like someone's internal site search, or a database of select known trusted content authors), higher is generally better
2. From a broad corpus of external content (like general web search, where many people have an incentive to try to game the system), less is generally better
For today’s search engines (Google, Yahoo, Bing) keyword density is just a very small factor when it comes to ranking pages for a specific keyword. It is, however, important to use your focus keyword(s) inside all the important on-page elements: Title tag, Meta description, H1, body, alt tag, and internal links to make sure search engines understand your content.
In addition to the on-page elements, off-page factors like backlinks and anchor text still play a major role for search engines when indexing and ranking your web pages.
The best keyword density is like the ideal content length… A question asked by many and luckily answered by few. There is no exact answer to this question because it all depends on the topic your writing about. Some topics ideal for long content forms and a lot of related keywords and synonyms. On the other hand, you have the topics that are best served with a compact piece of content and a higher repetition of the same keywords. The best advice on this topic is writing natural and for human users instead of computers algorithms and crawlers.
Search engines may place significant weight on domain age, site authority, link anchor text, localization, and usage data.
Each search engine has it's own weighting algorithms. These are different for every major search engine.
When people focus too much on density they often write content which people would not be interested in reading or linking it.
Lots are queries are a bit random in nature. Roughly 20% to 25% of search queries are unique. When webmaster tweaks up page copy for an arbitrarily higher density, they typically end up removing some of the modifier terms that were helping the page appear relevant for many 3, 4, 5 & 6-word search queries.
Semantically related algorithms may look at supporting vocabulary when determining the relevancy of a page. If you pulled the keyword phrase you were targeting out of your page copy would it still be easy for a search engine to mathematically model what that phrase was and what your page is about given the supporting text? If so, then your rankings will be far more stable AND you will likely rank for a far wider basket of related keywords.
The virtuous keyword density helps you to enhance the ranking of your webpage on search engines. To check whether you used the right density, you can use the free keyword density checker tool.