Hi Rajnish
There are 2 types of assets
1. Tangible (Assets which can be seen like Building,Machine)
2. Intangible (Assets which cannot be seen like Goodwill,License,TRADEMARK)
On tangible assets,Depreciation is charged
On Intangible,Amortization is charged
Amortization is reduction in value of Intangible assets
in technical terms,
Amortization is allocating the cost of an intangible asset over a period of time