How to use advanced filters in Facebook Ads?

You can filter the data to be imported using Graph API syntax - [filter_1, filter_2, ... , filter_N].

For single filtering you can use a single filter ([filter_1]) - the structure, in this case, is as follows:

[
   {
      "field":"adset.name",
      "operator":"CONTAIN",
      "value":"Blog"
   }
]

field - means the field name that you want to apply the filter to
operator - condition that you want to use in the filter. Facebook Ads API allows using of one of the following values: EQUAL, NOT_EQUAL, GREATER_THAN, GREATER_THAN_OR_EQUAL, LESS_THAN, LESS_THAN_OR_EQUAL, IN_RANGE, NOT_IN_RANGE, CONTAIN, NOT_CONTAIN, IN, NOT_IN, STARTS_WITH, ENDS_WITH, ANY, ALL, AFTER, BEFORE, ON_OR_AFTER, ON_OR_BEFORE, NONE, TOP
- value to compare a field against: it can be a number (without quotes), a string (with quotes), or an array of values (numbers or strings)

A single filter looks like this:

Some popular examples of a single filter (ready to copy-paste):

Filter by Ad name containing some value:

[
   {
      "field":"ad.name",
      "operator":"CONTAIN",
      "value":"Blog"
   }
]

Filter by Ad set name equal to value:

[
   {
      "field":"adset.name",
      "operator":"EQUAL",
      "value":"Blog"
   }
]

Filter by Amount Spend:

[
   {
      "field":"spend",
      "operator":"GREATER_THAN",
      "value":10.0
   }
]

Filter for either item on a list of actions (for example, action_type must be link_click orlanding_page_view):

[
   {
      "field":"action_type",
      "operator":"IN",
      "value":[
         "link_click",
         "landing_page_view"
      ]
   }
]

Several filters usage in a single data flow: [filter_1, filter_2]

[
   {
      "field":"action_type",
      "operator":"IN",
      "value":[
         "link_click",
         "landing_page_view"
      ]
   },
   {
      "field":"adset.name",
      "operator":"CONTAIN",
      "value":"Blog"
   }
]