SEO keywords are the key words and phrases in your web content that make it possible for people to find your site via search engines. A website that is well optimized for search engines "speaks the same language" as its potential visitor base with keywords for SEO that help connect searchers to your site.

Keyword is a popular word and phrase people enter into search engines.

Keywords
 

Keywords are the most important SEO element for every search engine, they are what search strings are matched against.

SEO keywords are the key words and phrases in your web content that make it possible for people to find your site via search engines. A website that is well optimized for search engines "speaks the same language" as its potential visitor base with keywords for SEO that help connect searchers to your site.

A keyword, in the context of search engine optimisation, is a particular word or phrase that describes the contents of a Web page. Keywords are intended to act as shortcuts that sum up an entire page. Keywords form part of a Web page’s metadata and help search engines match a page to with an appropriate search query.

This is the Keyword, which is driving traffic to a specific URL of my blog. (We also call it target keyword, or keyword one is trying to rank for).

Keywords are the words and phrases that Internet users type into search box of a search engine, such as Google, to find what websites that match what are looking for. Some keywords get hundreds of thousands of unique searches a day while others get a couple of hundred.

a word or concept of great significance.
"homes and jobs are the keywords in the campaign"
a word that acts as the key to a cipher or code.
an informative word used in an information retrieval system to indicate the content of a document.
a significant word mentioned in an index.