The boundaries between these categories are assigned as vzbredet in the head and are very fuzzy. This is because the number of requests for different spheres of human activity may be very different. So based on the data Yandex, the frequency of the word "phone" some time 7648295, and the word "exposure meter" – 600. Respectively for a single site telephone call would be the most high-frequency, and another – "exposure meter". Choosing keywords to promote Internet store.
To choose the right keywords you need to understand law: competition for higher-frequency more requests. The more expensive it will be promotion of the store, the more competition. Promotion online store that sells exposure meter will cost a lot less expensive and requires less effort. Consider the same examples. Top exposure meter can unwind with the most high queries because it is a narrow scope and the competition here is very small.
Promotions online store that sells phones, will depend on the budget. Promoting e-shop for high-frequency words do not enjoy cheap, you can solve this problem using a set of nizkochastotnikov. In addition, most visitors come for the bass, the most targeted audience. In this case, promoting low-frequency words, get more number of potential customers! Contextual advertising. Choosing keywords is also important for search engine advertising, because if the wrong approach for a short period of time, you can lose a lot of money without having the desired result. Contextual advertising, particularly search, always the user's request. That is, you select the audience you need while matching queries for ads. For example, if you are selling phones you do not want visitors who are looking for programs to Fight the phone. Thus in prfessionalnom of semantic core need and promotion of web sites and contextual advertising. This will allow you not only reduce costs, but also lead directly to the site your target audience, not random people. Which subsequently should not only recoup the costs of advertising, but also generate income.