A PPC audit is a structured examination of a live paid media account against the commercial result it is supposed to produce, ending in a ranked account of what to change and in what order. The surface is wider than most audits cover: account structure and campaign taxonomy, bidding strategy and the portfolio effects it actually has, conversion tracking integrity and offline conversion import, audience and exclusion hygiene, negative keyword architecture, budget pacing and wasted spend, creative and landing page alignment, and measurement (whether the conversions the platform reports correspond to anything in the CRM). Search terms, placements and Performance Max asset groups are read in full rather than sampled.
What you are buying here is the engagement, not the definition. It is fixed scope and it ends in a written document: an executive summary naming the three decisions worth making, the evidence behind every finding, and a change list ordered by the spend each item wastes or leaves unclaimed. What happens next is your choice (implement it in-house, hand it to the agency you already pay, take it into a B2B paid media strategy engagement, or move to full paid media management or channel-level Google Ads management with me). The audit is not written to sell any of those.