<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>00000006 - Disclosure - DESCRIPTION OF BUSINESS</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>2</Level><ElementName>us-gaap_NatureOfOperations</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="From2013-01-01to2013-06-30" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Dynamic Energy Alliance Corporation (&amp;#147;DEAC&amp;#148;)
was formerly Mammatech Corporation (&amp;#147;MAMM&amp;#148;) (or the &amp;#147;Company&amp;#148;), and was incorporated in the State of Florida
on November 23, 1981 as Mammatech Corporation.&amp;#160;&amp;#160;From 1981 through the first quarter of 2011, the Company&amp;#146;s business
was that of a marketer of tumor detection equipment.&amp;#160;&amp;#160;On March 9, 2011, Mammatech and Dynamic Energy Development Corporation
(DEDC), a private corporation, transacted a reverse triangular merger in which DEDC became a subsidiary of Mammatech and DEDC staff
began to operate the Company, shifting its focus to the recoverable energy sector. The fiscal year end of the Company was changed
to December 31 from August 31.&amp;#160;&amp;#160;The Company formally changed its name to Dynamic Energy Alliance Corporation, having
amended its Articles of Incorporation effective September 15, 2011.&amp;#160;&amp;#160;The Company&amp;#146;s new trading symbol, DEAC, became
effective in December 2011.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Through its wholly owned subsidiary, Dynamic
Energy Development Corporation (&amp;#147;DEDC&amp;#148;), the Company has a business plan to develop, commercialize, and sell innovative
technologies in the recoverable energy sector. Specifically, it is focused on identifying, combining and enhancing existing industry
technologies with proprietary recoverable production and finishing processes to produce synthetic oil, carbon black, gas, and carbon
steel from discarded or waste tires&amp;#160;waste. This process will be accomplished with limited residual waste product and significant
reductions in greenhouse gases, compared to traditional processing. To maximize this opportunity, the Company has developed a scalable,
commercial development strategy to build &amp;#34;Energy Campuses&amp;#34; with low operational costs and long-term, recurring revenues.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;In conjunction with the acquisition of DEDC,
the Company acquired Transformation Consulting (&amp;#145;TC&amp;#148;), a wholly-owned subsidiary of DEDC.&amp;#160;&amp;#160;TC provides business
development, marketing and administrative consulting services.&amp;#160;&amp;#160;Through a January 2010 management services and agency
agreement (&amp;#147;Agency Agreement&amp;#148;), TC receives revenues from a related party based on billings received from certain of
TC&amp;#146;s direct to consumer membership club products that were transferred to the related party under the Agency Agreement.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;i&gt;Merger Acquisition by way of Share Exchange&lt;/i&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;b&gt;&amp;#160;&lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;On March 9, 2011, the Company effectively completed
a merger acquisition transaction whereby it entered into a Share Exchange Agreement (&amp;#147;SEA&amp;#148;) with DEDC, a privately
held corporation, with DEDC becoming a wholly-owned subsidiary of the Company. All of the shares of DEDC were transferred to Dynamic
Energy Development Corporation, a Delaware corporation. This company was then merged with the Company. The share transactions to
complete the merger transaction are hereinafter collectively referred to as the &amp;#147;Merger.&amp;#148; All costs incurred in connection
with the Merger have been expensed.&amp;#160;&amp;#160;Following the Merger, the Company abandoned its prior business and concurrently
adopted DEDC&amp;#146;s business plan as its principal business.&amp;#160;&amp;#160;In addition, the director and officer of MAMM were replaced
by the directors and officers of DEDC.&lt;/p&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for the nature of an entity's business, the major products or services it sells or provides and its principal markets, including the locations of those markets. If the entity operates in more than one business, the disclosure also indicates the relative importance of its operations in each business and the basis for the determination (for example, assets, revenues, or earnings).</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 275

 -SubTopic 10

 -Section 50

 -Paragraph 2

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 -Publisher AICPA

 -Name Statement of Position (SOP)

 -Number 94-6

 -Paragraph 10

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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