Explanation:
A familiar grouping of words which appears together because of their habitual use and thus creating the same meaning is called collocation. Suppose, when we say heavy rain instead of big or strong rain, it conveys the meaning that it is raining heavily.
Although in the above example strong rain or the big rain conveys the same meaning. In fact, both of them are also grammatically correct. But, the use of big rain or strong rain will sound strange. Thus, we use heavy rain to sound natural and a lot better English.
Similarly, there are many such examples where we use a particular set of groups of words to sound naturally correct. A group of words that are expected to be together can also be defined as collocations. Some more examples of collocations are to do homework, to make the bed, to take a risk, etc.
Besides the reasons mentioned above, there are reasons as well for using collocations. These are:
Making the use of the English language natural and interesting
As it follows a particular order, it helps in adhering to pre-decided and a proper structure of the English language
Helps in beautifying the language
Make better use of words or group of words by presenting it in better form
It enhances the use of language and thereby comparatively leads to innovation of the English language
