Question

What's importance of topic?

Answer 1

Good question.

Its importance is that u write or say according to the given question or topic by elaborating it, describing it,and by giving ur own views on it.U speak on the given topic in straightforward manner without going in a roundabout manner,and that's the topic.

Answer 2

the topic sentence has several important functions: it substantiates or supports an essay's thesis statement; it unifies the content of a paragraph and directs the order of the sentences; and it advises the reader of the subject to be discussed and how the paragraph will discuss it.