What is the purpose of keyword in SEO?

Main purpose of using keywords to optimize the full site with a simple word that word referred as Keyword.Because it is quite difficult to remember all sites which are provide that facility. means if we have to check dresses then it is difficult to remember all sites which are related to that keyword.

The main purpose of inserting targeted keywords is to make your website visible on the search engine. It helps to visible your website if the users inserted related to your keywords term.

The purpose of SEO is to reduce the time a person spends searching for a relevant result (by elevating that page above the fold in the top 5 positions).
SEO, or search engine optimization, is a process by which websites become more appealing to search engines. By targeting certain keywords through different search engine marketing techniques, site owners can improve their chances of showing up as a result for a search

Keywords are the search terms used to find your website in search engines. They are selected using Google keyword planner to rank websites higher in search results. They are implemented on the website meta tags and content to help increase the visibility of your domain in search engines.

A keyword, in the context of search engine optimization, is a particular word or phrase that describes the contents of a Web page.

keywords tell the search engines what your website/page is about. Your page is indexed and keywords help the search engines decide what your data is. If your using anchor text for a picture, you use it to describe what the picture is. That in turn tells the search engines what the picture is and how to best index and present it.

Keywords are the search words that takes users to search any topic on search engine and then helps to redirect to your website.

Main purpose of using keywords to optimize the full site with a simple word  that word referred as Keyword.Because it is quite difficult to remember all sites which are provide that facility. means if we have to check dresses then it is difficult to remember all sites which are related to that keyword. So  we type dress on the search engine then the Search engine returns the result related to that products.

Keyword research is generally most important to SEO professionals, or those looking to gain from organic search engine traffic. SEO professionals diligently search for keywords that would be the most profitable and easy to rank for. They then build websites and web pages around these keywords, hitting every possible mark for a 100% online SEO score. Once that is achieved, they take their efforts off page to gain high page rank back links which will help to boost their website's or web page's SEO benefits and help the website or web page climb to the top of the Google search results.

Keyword is a word or group of words that makes a phrase that is being typed by the person in search box of the search engine. - These keywords are used by search engines to populate the subjects over the Internet and search results are populated according to that.