Answers:
A big company take over a smaller (or ailing) company to breed one larger and allegedly more updated company.

to get hold of access the that companies product rank, personnel, customer register, technology
to…
1-to fuel the company’s stock price & investor confidence
2-Improve the company’s quarterly results
3-improve the company’s asset value(can also do same as below)
4-improve the company’s size against a possible capture of itself
5-let the company enter into another market
6-improve the company’s market share
7-etc. etc. etc.