Using a contact logging software is important for amateur radio operators as it allows them to keep a record of their contacts with other radio operators. This record can be useful for a variety of reasons, such as:

1. Confirming QSOs (contacts): Logging software allows you to confirm that you have made a contact with a particular station, which is important for contests and awards.

2. QSL Cards: Logging software helps to manage QSL cards that

   confirm a contact, making it easier to send and receive them.

3. Tracking Progress: You can track your progress on specific modes, bands, or DXCC entities, for example, tracking how many contacts you have made with different countries, states or provinces.

4. Backup: You can keep a backup of your log and restore it in case of a computer crash, theft, or other disaster.

5. Information for Others: Your log is a valuable source of information for other operators who want to confirm contacts, check your information, or learn more about what you do.

When it comes to choosing the best logging software for you, it depends on your personal preferences, operating style, and budget. There are numerous logging software available, both free and paid. Some popular options are:

1. Ham Radio Deluxe: A comprehensive logging software that offers numerous features, including rig control, digital modes support, satellite tracking, and many more.

2. N1MM Logger+: A popular logging software among contest operators, N1MM Logger+ has many features designed specifically for contesting, such as real-time scorekeeping, dupe checking, and integration with other contesting software.

3. DXLab: A suite of software designed for DXers, DXLab offers logging, rig control, digital modes support, and many other features. It is free to download and use, but donations are encouraged.

4. Log4OM: Another comprehensive logging software that supports rig control, digital modes, and satellite tracking. It also has a feature that automatically uploads your log to various online services.

5. CQRLOG: An open-source logging software that is free to use and offers support for many different modes, including CW, SSB, and digital modes. It also supports rig control and integration with other software.

6. Amateur Contact Log: An easy to use general logging program that has many great features including tracking of worked all states, counties and countries

Overall, the best logging software for you depends on your specific needs, so it is a good idea to try out a few different options before deciding on one.