Asset management or investment management is the management of different capital or real estate. The purpose of this management is  that investors get the income. Investors can be private or companies (insurance companies, corporations, etc.).

So, for example, people have auto loans. A company that gives you a loan must get the income from you. So, it is clear that you will pay for loan car more than in case of buying it.

Property management is operations with residential, commercial or industrial property. If you have residential property, you should better have personal property insurance. It allows you to have some guarantees of having money in the case of insurance.

Asset management is a very wide definition. There are thousands of books, in which you can read much about asset management. Nowadays it is also very easy to find information in the Internet. Nowadays it becomes easier to use the technology of asset management because of the technical progress and software technologies. You can get such technical software in some specialized stores or in the Internet. There are also different courses and training programs for people, who want know much about asset management and who want to protect their money and property. Many companies send their employees to study this subject at some courses, because not every company can allow asset management professionals.
The industry of asset management becomes more and more popular nowadays. More and more people join this industry. If you want to know more, you can always search for some information in the Internet.