Open Graph Meta Tags help control how your webpage interacts with Facebook. PageLines has some of these tags built into the framework, however there is currently no way to easily customize them. If you use the tags that come with the Facebook All-In-One section, you can either leave them alone so they will default to the same settings that PageLines provides, or you can customize them on a page by page basis.
To used these tags, just enable them in the PageLines Meta Settings for each page or post you want to use them in. You need to remember to disable the Open Graph tags that are built into the PageLines framework, otherwise each set of tags will load in your page’s header, and there will be confliction.
To disable the built in tags:
From your dashboard, click “PageLines” then “Site Options”
Click the “Header And Footer” tab
Scroll down to the “Facebook Opengraph” and un-check “Display facebook Opengraph data in page header?”
Click “Save Options”
A common issue you may notice is that when you setup a custom tag, you won’t see the change reflected on Facebook right away, even though you can see that your custom tag did load. This is because Facebook has a cache system in place that resets every 24 hours. So if your page or post already had an Open Graph Meta Tag set, it could take up to 24 hours for any changes to that tag to take effect.
If you don’t want to wait that long to see your change, all you need to do is change the URL of your page or post to something new. Facebook will then see this new URL and your custom Meta Tag will soon take effect.
For more information about Open Graph Meta Tags, check out this Facebook Documentation
fb:app_id
When you assign your page or post to a Facebook application, you will have greater control over the functionality of the Facebook All-In-One section. Anybody listed as an administrator of the Facebook Application you assign will have administrative rights to the section.
For example: If you are using the Facebook Comments section, administrators have the ability to moderate the Facebook comments left on each page or post. You also can choose to make the default for new comments entered either “visible to everyone” or “has limited visibility” on the site (i.e., the comment is only visible to the commenter and their friends), to help mitigate irrelevant content.
Admins can also blacklist words and ban users. If a new comment is published from a banned user or contains a blacklisted word, this comment will automatically have limited visibility.
You can moderate comments from the front end of each page inline. If you have specified your app id as the admin, you can moderate all your site’s comments at http://developers.facebook.com/tools/comments.
fb:admins
You can also moderate comments my simply specifying your Facebook user ID as the admin, however you won’t have as much functionality as you would using a Facebook App ID. You can list multiple admins here by listing each Facebook User ID separated by a comma. If this field is left blank in the PageLines Meta Settings, the fb:admin tag will not appear in your page’s <head> section.
og:image
When using the Like Button, you can specify the image that will appear on Facebook that represents what is being liked. If you do not specify an image in the PageLines Meta Settings, the og:image tag will link to the page’s Featured Image. If no Featured Image is set, then the og:image tag will not appear in your page’s <head> section.
og:title
You can leave this blank in the PageLines Meta Settings, but if you wanted to you can add your own custom title to whatever your Like Button is set to Like. If this is left blank, the og:title tag will simply default to the WordPress title of the page or post being liked.
og:type
This specifies the type of entity that is being liked. In the PageLines Meta settings, you will see a drop down of all the available types to choose from. If you do not specify one, the og:type tag will default to “website”
og:url
You can leave this blank in the PageLines Meta Settings, but if for some reason you wanted to specify a different URL other than the one being liked, you can do so here. Keep in mind that if you specify a different URL, the Like Button will use whatever tags are set for that URL, & ignore all your other Open Graph tags that you have set. If you leave this field blank, the og:url tag will simply default to the page’s own URL.
og:site_name
You can leave this blank in the PageLines Meta Settings, but if you wanted to you can set your own custom Site Title. If you leave this field blank, the og:site_name tag will simply default to the WordPress Site Name.
og:description
You can leave this blank in the PageLines Meta Settings, but if you wanted you can type your own description for whatever it is being liked. This description will appear underneath Title of what is being liked on Facebook. If you leave this field blank, it will default to a 15 word excerpt of the page’s content.
