Collocation is the pattern of two or more words that appear together.
Collocation is not concerned with grammar, but it is the popular using of words that is correctly to use of native speakers.
Currently, collocation is the main problem for learners of English as a second language or as a foreign language because in the present day, the most English teachers have been teaching to focus on using correct grammatical rather than collocation instruction, although collocation play a role in language acquisition. English learners should not be ignored collocation for the purpose of using of correct words like native speakers. In addition, collocation is also other important terms such as:
1. Collocation can help the language that is more natural and easily understand.
2. Collocation will have many choices of words in expressing yourself.
3. Collocation can help learner for easier to remember and use language in many words rather than as single words.
And then Sadeghi (2010) state about important of collocation that is higher importance in purpose of use, acquisition, learning language and translation.