Step - 1 Go to this link and open it :-
https://developers.facebook.com/docs/plugins/like-box-for-pagesStep - 2 Write your Facebook Page URL like :
https://www.facebook.com/aspdotnetsandeep Step - 3 Write
Width & Height like : 220px & 150px
, you can change according your need.
Step - 4 Check on Show header, Show Border & Show Friend Face.
Step - 5 Click on get code. (When you will click on Get code button they will show fb login window, if you are already login they will show you code else do login your fb account.
Step - 6 Click on IFRAME Tab.
Step - 7 They will generate you fb page plugins code. Copy this code and paste in your website page where you want appear this.
Note : Create your Fb Page First