Google’s photo hosting service is/was called Picasa. Picasa is both a program you can download and the name for their online storage space. You can also access your photos in Google+ or from any Google interface by clicking ‘More/Photos’. In order to post a slideshow of your photos on a blog, you’ll need to access your photos via picasaweb.google.com (see below for directions).
To upload photos From Google+ click Profile/Albums/Upload New Photos
If you click ‘More/Photos’, you’ll see Upload New Photos in the top right corner.
Select ‘Public on the web’ and click continue.
For now, if you want to embed a slideshow of photos, you need to go to: http://picasaweb.google.com/
To embed the slideshow of photos on a blog, click ’embed slideshow’
Select the slideshow size, copy the code and paste it into yoru blog post
*remeber to select ‘edit html’, not compose