Auto Exclude Adwords' Placement With Adwords Script, and Using Google Sheet to Save Records Generally, I Exclude Placement Based on Top Domain, But it is easy to change that, you Still can define a function to make yourself change
Firstly, To run script, You need clone a sheet first click the following SPREADSHEET_URL, click make a copy to clone the template, paste your SPREADSHEET_URL to replace the defualt SPREADSHEET_URL
The Template is right Here: Template
Then, You need to paste the Script into adwords Scrpit runner, and preview and Run. Check The output and your own SPREADSHEET_URL
You Can Know More Detail In My Post