Been trying to add the social feeds into the website. there have been a bunch of ways of doing and I'll have to watch I don't set up Weebly to automatically update facebook and then get in a cycle and crash facebook, weebly and the internet...LOL.. So quite of lot of places instructing you to add a post to the website, but embedding one post instead of the facebook feed is defeating the object.. Anyway, instead of googling and getting 5000 people trying to sell you something you don't just search in Facebook help and the developers bit. Don't worry its all copy and paste. https://developers.facebook.com/docs/plugins/page-plugin/
This is the bit that I found and you can add the code to the page and then add the code for the facebook profile/page you want to add and its all done. set the height to about 600 so weebly doesn't make the feed nine miles long. Twitter you have to go to embed the tweet, but you can scroll up to "what you want to embed" and then cut the post off the end and use the tweeter feed line like https://twitter.com/RileyRPRacing/ and it will do the feed, click on "customise" text and set the height to 600.
These methods change fast as you can tell from this video, the method has changed twice, once when they were making it and once after because their way doesn't quite work!
Right thats done, Instagram next...
Well I used the POWr app to do instagram, we get one feed free with the app. Scroll to the bottom in weebly and click on the add app bottom and select POWr Social feed, follow the instructions and it puts in Instagram feed or whatever feeds you want. You could use that to do them all, but its another cost... Go free, I say!