The quality is better. When you upload photos directly to Blogger there is a weird loss of quality. Sometimes it's noticeable, sometimes not. But better to be safe than sorry, eh? You also get way more storage space on Flickr, 1 terabyte! That's a lot!
Having the photos on Flickr is also a good way to share the post on Flickr. You can add photos to groups, add tags and you can add a direct link to the blog post in the photo's description on Flickr. And if someone clicks on your photo on our blog then it will take them to your Flickr page, so it gives you (or atleast your Flickr page) a bit of a traffic too. ;-)
It's a couple of extra steps to use Flickr to host images, but it's easy once you get the hang of it.
I hope you are already familiar with how to upload photos to Flickr, below I will show you how to grab the code to add the photo to a blog post. I'm showing this for Blogger because that's what I use, but the process will be similar in other blogging platforms. :-)
Since I did the screen shots for this tutorial, Flickr have actually made some changes to this menu, so the IFRAME option doesn't show anymore.
Tip: Flickr remembers the setting from last time, so if you're adding more than one photo, you should be able to skip steps 2-3 and simply copy the code for each photo.
I have no doubt that that could be useful, but it's mainly useful for Flickr so people are reminded that the photo comes from there so to speak.
On a blog, where you're trying to make things look pretty and cohesive.. it doesn't look so great. Fortunately, it's easy to remove!
. . . . . . . . . . . . . . . . . . . . . . . . .