There is much confusion about the word here. One of the commonest errors is the use of here in the old British expression hear, hear. People who are not familiar with the old British expression usually mistook the words for here, here rather than the correct form. It is an easy mistake to make because the expression is most often heard than seen. However, it must be noted that hear, hear is the short form of hear ye, hear ye or hear him, hear him and is used as a cheer in the House of Commons and House of Lords in the 17th Century. The King James Bible also used the verb hear to command the attention of the people. Amusingly, here, here has more Google hits than the correct form hear, hear.
Here and hear can be identified easily by understanding the use of both words in the sentence. Hear means to perceive sound or gain information. Hear also contains the word ear, which means to hear. The location word here is most often used as an adverb that modifies the location of the verb.
Another confusion of the word is its use in grammar. Here and there are both location words and are often used together with demonstrative determiners this, that, these, and those for emphasis. Here is used in various grammatical uses. It can be used as a noun to indicate the location of a nearby object while there indicates the location of something that is far away. As an adjective and adverb, here is used to modify the noun or verb by giving more information about the noun or verbs location or circumstances.
Here is also used in various idioms such as look here, same here, here goes, this here, here and now, etc. Here is used together with these words to emphasize a point, show affirmation, a contraction, and as informal addition to the sentence. The usage can be confusing sometimes but in the end, here is used to specify the location and must not be mistaken for something else.