Question

The Documentation from facebook isn’t understandable, atleast for me.

I have never worked before with facebook and had a basic requirement of putting a like button on Product pages.

So yesterday, I added the OpenGraph meta tags and like button to my Product pages as stated in this documentation, https://developers.facebook.com/docs/opengraph/. I also created an app, as the document stated that it has extended the basic meta data to add a required field to connect your webpage with Facebook: fb:app_id.

The like button has been set but i have few queries which are as following :-

1. For some pages, the like button doesn’t read the og tags. Rather than publishing the whole thing in a story manner by reading og tags, it just shows a link. During googling, I read it happens because of facebook caching and since, I shared the link on facebook before putting the meta-tags, this is happening. So, Is there any way that I can direct facebook to reset all the caching for my pages or scraping that it has done earlier.

2. Though I have created the App, I actually have no idea what to do with it. Why is it needed and what matters it can help me with.

3. I tested one of my URLs here: Facebook Linter but it shows some error and stuff which i can’t understand. Below is the image. Please tell if I have done anything wrong and why it’s showing these errors

Answer 1

Documentation for OpenGraph on Facebook containing outdated information about pre-defined types, see OpenGraph Types. You probably need to define your custom Object Type “Product” in for your Application/Site using Developer Application in Open Graph settings.

You may want to read Documentation for OpenGraph beta too.

Update:
There is a similar question about exactly this og:type: Opengraph meta tag og:type set to “product” errors (like button & URL linter/debug)