Practice of Defining Semantic core or Selecting Keywords

As you know, search engine optimization and promotion aimed at improving the “visibility” site in search engines for specific (earmarked for the site) search queries. One of the first tasks for your site – this is the correct identification of the most important search terms or, as the pros, of semantic core, the most frequently used term “keyword list”. Defining semantic core is an important and not so easy task. The overall goal of keyword selection is to find words that you think potential customers will enter when searching for the product you are offering.
Choose keywords.

When selecting keywords, to find out which search queries can use the users (your potential customers) in search of what your site offers. Select words that will allow solving the problem the search user.
For instance, a site that sells gifts may focus on the keyword phrase:
* Gift
* Gifts
* Gift Shop
* Souvenirs
* Buy a gift
* Booking gifts
* Business gift
* Gift to the (+ add the traditional holidays)
And so on…
However, if your online store offers only expensive exclusive gifts, is primarily to draw attention to the words:
* Expensive gifts
* Exclusive gifts
* Business gifts
* Gift for the boss
* Gift Shop

It is the fact that the request “gifts” general enough. A person who is looking for an exclusive gift, he is unlikely to find it in the transition to online store ordinary gifts. That is, if your site offers unique services or goods, especially pay attention and look for keywords that will lead you to a potential client. Such visitors will be targeted to your site, which will increase the conversion rate, i.e. the ratio of required operations (orders, calls from the site, sales) and the total number of visitors.
In the selection of semantic core, it is not necessary to include the keywords that are not the answer to a user request and bring it to a page where he cannot find the answer for yourself. For example, if your site offers a daily rent of apartments, the site should not be promoted on-demand “apartments for sale”. It is a mistake to believe that additional investments in the promotion of on-demand “apartments for sale” bring something other than the diversion of traffic. In addition, to promote on-demand “apartments for sale” will need to edit the Meta tags of promoted pages, thus “diluted” the targeted keywords.
It is important to remember: the promotion of non-target keywords, usually not justified economically.
Ideal keywords receive a reasonable number of searches engines, are relevant to your site’s content and are not heavily used by competitors.
Expanding the keyword list and defining of semantic core.

If in the first phase of the semantic core, we create the keyword list, and then receiving a list of keywords we can expand it. We can Use the Keyword Tool to get new keyword ideas.

https://adwords.google.com/select/KeywordToolExternal