Why is it important for financial statements to receive an unqualified auditor’s opinion?

An unqualified auditor's opinion means that the financial statements are reliable and that the firm isn't in trouble.
It is important to get this designation in order to get the trust of users of financial statements such as creditors and investors and to keep the share price high.
Otherwise, it will be difficult for the company to get further investments and loans and current investors may also start selling their shares, thus resulting in a decline of share price.

BECAUSE IT MEANS THAT IT CAN BE RIELY ON MAKING DISSION AND FREE OF MATRAIL MISTAKES

Because an unqualified opinion is issued when the independent auditor believes with reasonable assurance that the company's financial statements are sound; that is, the statements are free from material misstatements and can be relied upon.

An unqualified opinion is important for financial statements because, independent auditor believes that the company's financial statements are sound; that is, the statements are free from material misstatements.
This is different from a qualified opinion which is issued when the independent auditor discovers something in the financial statements that is subject to major concern.

Unqualified opinion shows that the financial statements reflect a "true and fair view".

The statement of Mr Kokab Rahman (with all due respect) is not altogether correct as a company might get an unqualified audit report by disclosing and accounting for its correct financial position and all the transactions fairly in the financial statements, even if it is in a worst financial trouble, its share price is at extremely low or if the bankers/creditors have refused to extend loan/credit to the Company. 

(Farhan - senior manager audit Ernst & Young)