You can add friends to your Close Friends list to get a notice each time they post. You can turn these notices off at any moment.
How To Add Friends To Close Friends On Facebook
1. Most likely to their account
2. Hover over Friends on top of their account
3. Select Close Friends
Keep in mind: You can add friends to greater than one list or remove friends from a list.
Approach 2
1. Open the Facebook app.
2. Tap menu icon in top appropriate corner > Friends
3. In the Friends tab, tap the friend you want to add in the Close Friends list to watch her/his Facebook page
4. Touch the Friends button > Edit Friend list
5. Select Close Friends, and after that touch Done.
