Can I use my debit card number without the card?

Could you please clarify for me, is it possible to utilize my debit card's number for transactions without physically possessing the card itself? I'm interested in understanding the feasibility and potential security implications of this practice. Additionally, are there any specific services or platforms that facilitate such transactions securely and reliably? It would be greatly appreciated if you could elaborate on the steps required to safely execute such a transaction, if indeed it's a viable option.