I created my own icon for my website that I want to use. I hate having that Magento logo for my site. How do I do it?
if it is for magento 1 version ,
Log into your Magento Admin Panel.
System > Configuration > Design(in the left side menu) > Header.
Change the file name in the "Logo Image Src" to the file name you just uploaded.
Leave the images/prefix alone.
Click "Save Config"
you can find more information in below links :
for magento 2 version , below link :