Exhibit 23.1

KPMG LLP

345 Park Avenue

New York, NY 10154-0102

Consent of Independent Registered Public Accounting Firm

We consent to the use of our reports dated February 7, 2024, with respect to the consolidated financial statements of Omnicom Group Inc. and subsidiaries (the Company) including the consolidated balance sheets as of December 31, 2023 and 2022, the related consolidated statements of income, comprehensive income, equity, and cash flows for each of the years in the three-year period ended December 31, 2023, and the related notes and financial statement schedule II (collectively, the consolidated financial statements), and the effectiveness of internal control over financial reporting, incorporated herein by reference, and to the reference to our firm under the heading "Experts" in the prospectus.

/s/ KPMG LLP

New York, New York

January 17, 2025

KPMG LLP, a Delaware limited liability partnership and a member firm of

the KPMG global organization of independent member firms affiliated with

KPMG International Limited, a private English company limited by guarantee.