Ad blockers identify advertisements mainly by using filter lists that contain rules for blocking known ad servers, scripts, and page elements that match typical advertising patterns. Many modern blockers also apply automatic detection methods that analyze page structure, script behavior, and network requests to recognize suspicious content that resembles ads or trackers. Because these unwanted elements are prevented from loading, pages often require less bandwidth and processing power, which can make browsing noticeably faster and smoother. However, some websites depend on scripts that may be blocked accidentally, so disabling the ad blocker for specific sites is sometimes necessary.