Ad blocking can be done in several ways:

• Packages adblock + luci-app-adblock. The latest adblock online documentation can be found here: README

• Packages simple-adblock + luci-app-simple-adblock The latest Simple Adblock online documentation can be found here: README

• Package banhostlist (has not been updated since 2015)

Instructions for Adblock quick setup.

# Install packages
opkg update
opkg install adblock
 
# Install dependencies for uclient-fetch
opkg install libustream-mbedtls
 
# Provide web interface
opkg install luci-app-adblock
 
# Enable Adblock
uci set adblock.global.adb_enabled="1"
 
# Backup the blocklists
uci set adblock.extra.adb_backup="1"
uci set adblock.extra.adb_backupdir="/etc/adblock"
 
# Use blocklists backup on startup
uci set adblock.extra.adb_backup_mode="1"
 
# Save and apply the changes
uci commit adblock
service adblock restart