Your blog posts need more attention and are deserved to that your readers can help spreading it. You can use Share button in RVsitebuilder 7 to make this mission completed.
1. On Post editor (and website pages as well) , select the position to place the Share button and click Section.
2. Select "Social Like and Share" section from Social Section, drag and drop to position you want.
3. Place mouse of the "Social Like and Share" section to activate its widget editor. And click on Facebook Like Editor"
4. Set the Like and Share buttons as you like. And Save
5. Click Save on Post editor.
6. Have the ton of shares!