To Release the Quality product to the customer.To find the 
defects in our application we r conducting testing.

we do testing to give better Quality to the product.we test 
the product wheater it is meeting the client/customer  
requirements or not

The purpose of testing is to find bugs and make sure they 
get fixed.
Uses are:
To improve the quality of the product. 
To provice that software has no defects.
To ensure that product/application works as user expected.
So, by doing these software testing we can stay in 
bussiness in competative world.

we do testing inorder to get the product without any errors.
i.e..,the product should be test continusly until we reach 
our reguirement and satisfies the customer.

Testing is the  correctness of  the products.Before 
releasing  the new  product  in the  environment,we  needs 
to  do testing.For  this,All the testing team  do testing 
to varify  and ensure  that the products  are  good  and 
safe for environment. Thats why we  do testing.In  
testing,  we do maximum bugs  count,  find maximum defects 
and send them for fixing.
                 In  the  software, we  test  the 
application for  bugs and  error free so that it  works 
perfectly.In this environment  there  are so many errors  
we  found.like syntex errors,spelling mistakes  and so many 
other errors .