Use includers to filter out irrelevant listings.
Tips for using includers successfully:
Use excluders to filter out unwanted listings.
Tips for using excluders successfully:
The key to a perfect feed is to analyze what key words you want to see and what key words you don’t want to see by studying the results from your first search in your feed. You need to fully understand what words you need to exclude and include in order to perfect your feed. Then add the key words in the filter categories. Then check you haven’t inadvertently blocked listings you want to see. Most importantly make sure you include all the relevant includers if you are using any includers. Also consider using price and location filters and blocking spammy sellers.