Is it okay to use debit card to shop online like paypal and amazon?

I have a debit card with a mastercard logo in it. Is it the same with a credit card? Is it safe to use it? i mean, is my account safe if i shop using paypal or amazon? Please help/guide me coz its my first time to do online shopping. thanks!|||paypal is the safest. if theirs a problem you can get ure money back. someone sent me fake dvd's on ebay and said they were real so paypal made me send it to them and gave my money back. they look after you. only use paypal.|||Yes..It is possible.|||Yes it is safe to use but always remember to use in safe websites..!|||Sure. Why not? Just make sure the website is trustworthy before you hand over your personal information.