AdCheckLab
for marketers
AdCheckLab
for marketers
GA4 files a session as Unassigned when its utm_medium and utm_source match no channel rule. Which values map, where common mistakes land, and how to fix them.
What utm_source, utm_medium, utm_campaign, utm_content and utm_term are for, a naming convention that holds up, and the six mistakes that cost real data.
Google Ads ValueTrack, Meta, TikTok, DV360 and CM360 macro syntax side by side, why encoding breaks them, which field each one belongs in, and how to test one.
Preview and test HTML5 banners before trafficking: the checks for Google Ads, CM360 and DV360, the sandboxed preview, click testing and why a preview stays blank.
Google Ads HTML5 ZIP rules in one place: 600 KB, 40 files, ad.size, the allowed CDN libraries with exact URLs, every upload error and the missing primary asset fix.
Fix a missing clickTag: the exact declaration, click binding, casing, Adobe Animate canvas banners, and which exit Google Ads, CM360 and Studio accept.
Compress HTML5 banner ZIPs for Google Ads, CM360 and DV360: what each limit measures, what the browser compressor does to images, and safe fixes for the rest.
Google Web Designer exits for Google Ads, CM360 and Studio: which environment to pick, the Tap Area steps, and the exact clickTag and Enabler code.
Animated GIF banner rules for Google Ads, DV360 and CM360: the 30 second limit, how loops add up, the 5 FPS rule, the 150 KB cap and how to check a GIF.
Banner ad sizes in one chart: Google display ad sizes, IAB standards, mobile and interstitial formats, plus weight limits for Google Ads, CM360 and DV360.
Pick one of 12 standard banner sizes or any custom size and download a blank PNG and an HTML5 starter ZIP, with a comparison table and a note per size.
Campaign Manager 360 HTML5 specs for 2026: 9.5 MB and 100 files, file types, the clickTag code CM360 expects, storage and naming rules, and upload fixes.
A 12 point QC checklist for HTML5 banners on Google Ads, CM360 and DV360, with the HTTPS rule in depth: where insecure links hide and how to fix them.
Google Ads, CM360 and DV360 HTML5 specs side by side, plus the storage rule, DV360 rejection reasons and fixes, and what other DSPs and the IAB expect.
Pinterest Idea ads safe zone: 270 px top, 440 px bottom, 65 px left, 195 px right on 1080x1920, plus 2:3 pin sizes, video lengths and title limits.
Instagram Story safe zone 2026: Story ads keep 269 px top, 672 px bottom and 65 px sides clear per Meta, organic Stories 250 px top and bottom. Free template.
TikTok safe zone for 1080x1920: 240 px top, 660 px bottom, 120 px sides plus the action column, from TikTok's own ads template. Free PNG and checker.
Instagram Reels safe zone 2026: Meta's 269 px top, 672 px bottom and 65 px side margins on 1080 × 1920, organic values, a free PNG template and a checker.
YouTube Shorts safe zone on 1080x1920: 288 px top, 672 px bottom, 48 px left, 192 px right from Google's ads template, plus organic values and a checker.
Social media video sizes for 2026: 9:16, 4:5, 1:1, 16:9 and 2:3 for TikTok, Reels, Shorts, Snapchat, Pinterest and LinkedIn, each sourced, plus safe zones.
Snapchat ad safe zone on 1080x1920: 192 px top, 672 px bottom and 65 px sides from Snap's official spec, a TikTok comparison and a free checker.
Meta ad specs 2026: Facebook and Instagram ad sizes for Feed, Stories, Reels, right column, in stream and more, with file, text and safe zone limits.
TikTok ad specs 2026: In-Feed, Spark, TopView and carousel sizes, lengths, file limits, caption rules and the safe zone, from TikTok's help center.
YouTube ad specs 2026: skippable, non skippable, bumper, in feed and Shorts lengths, sizes, text limits and Google's safe zones, all sourced.
LinkedIn ad specs 2026: image, video, carousel, document, conversation and text ad sizes, file limits and character counts, plus a vertical video safe zone.