The placement of a modem can vary depending on various factors, but generally there are a few considerations when choosing a suitable location for your modem:

1. Central location: Ideally, place your modem in a central location in your house so that the wifi signal can evenly spread throughout the house. This helps to ensure good coverage in all rooms.

2. Avoid obstacles: Make sure the modem is not placed behind thick walls, furniture, or other obstacles that can weaken the wifi signal. The freer the space around the modem, the better the signal quality will be.

3. Avoid interference: Do not place the modem near other electronic devices that may cause radio waves, such as microwaves, cordless phones, or baby monitors. These devices can cause interference and affect wifi performance.

4. Good ventilation: Ensure the modem has sufficient ventilation to prevent overheating. Do not place the modem in a closed space or directly next to other heat-generating devices.

5. Proximity to connections: Place the modem near the connections where the internet signal enters, such as the telephone connection or the fiber optic connection. This facilitates installation and ensures a reliable connection.

It can also help to place the modem at an elevated position, such as on a shelf or a desk, instead of directly on the floor. This can improve signal strength and reduce interference.

Every home is unique, so you may need to experiment and test to find the best location for your modem. You can check signal strength and speed in different places in your house to determine where the performance is best.

If in doubt, you can also ask your internet provider or a professional installer for advice on choosing the best location for your modem, taking into account the specific features of your home and your internet needs.