What wbraid actually is
wbraid is the counterpart to gbraid, introduced by Google Ads at the same time and for the same reason: Apple's App Tracking Transparency framework blocks Google from attaching a standard gclid to a slice of iOS ad clicks. Where gbraid is scoped to app conversions, wbraid covers the other half, a click that leads to a website conversion on the restricted iOS traffic where a direct one-to-one identifier isn't available. Google auto-appends it to the landing page URL, and a Google tag on that page reads it the same way it would read a gclid, feeding into conversion modelling rather than a deterministic match.
Why it looks less precise, on purpose
Because wbraid exists for traffic where Apple's rules already removed the individual-level signal, Google fills the gap with statistical modelling: aggregated patterns across similar clicks rather than a confirmed one-to-one link between this exact click and this exact conversion. That is a deliberate tradeoff, not a bug. If your account shows wbraid-tagged clicks with softer, modelled conversion numbers sitting next to gclid clicks with hard numbers, that difference is the restriction, not an error in your setup.
Is it safe to remove?
As with gbraid, a visitor sees no difference either way. For the advertiser, wbraid is the only bridge back to ad performance for this specific category of iOS traffic, and it is the source data conversion modelling depends on. The value is case-sensitive too, so a URL cleanup step that lowercases parameters indiscriminately can silently break the match even while leaving the parameter present.
If a link carries both
A landing page URL should carry gbraid or wbraid depending on the conversion path Google expected when the ad was clicked, not both at once. Seeing both on the same link is worth treating as a sign that two different tracking setups, an app deep link wrapped in a redirect that also carries a web tag, for instance, have been layered on top of each other rather than assuming it's intentional.