TIS-B targets on your ADS-B display are radar-relayed, not direct broadcasts - carrying up to 12 seconds of latency that can place traffic half a mile from where it appears.
TIS-B uplinks radar-derived traffic to ADS-B In receivers, but its position accuracy and latency differ significantly from direct ADS-B targets - and most pilots don't know the difference.
VFR flight following is a free radar advisory service any pilot can request - here's exactly how to set it up, manage it en route, and terminate it cleanly.
TIS-B fills ADS-B traffic display gaps using FAA radar data, but latency, coverage holes, and non-transponder aircraft create blind spots every pilot must understand.