Filed by ION Acquisition Corp 1 Ltd.

Pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: ION Acquisition Corp 1 Ltd.

Commission File No. 001-39581

Date: January 25, 2021

Important Information About the Business Combination and Where to Find It

These communications are being made in respect of the proposed transaction involving Taboola.com Ltd. (“Taboola”) and ION Acquisition Corp. 1 Ltd. (“ION” and, such transaction, the “Business Combination”). These communications do not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction. In connection with the proposed Business Combination, Taboola intends to file with the Securities and Exchange Commission (“SEC”) the Registration Statement on Form F-4 required to be prepared in connection with the proposed transaction (the “Registration Statement”) which will include a proxy statement/prospectus and certain other related documents, which will include both the proxy statement to be distributed to holders of Class A ordinary shares of ION in connection with ION’s solicitation of proxies for the vote by ION’s shareholders with respect to the Business Combination and other matters as may be described in the Registration Statement, as well as the prospectus relating to the offer and sale of the securities of Taboola to be issued in the Business Combination. ION’s shareholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus included in the Registration Statement and the amendments thereto and the definitive proxy statement/prospectus, as these materials will contain important information about Taboola, ION and the Business Combination. After the Registration Statement is declared effective, the definitive proxy statement/prospectus will be mailed to shareholders of ION as of a record date to be established for voting on the Business Combination and other matters as may be described in the Registration Statement. Shareholders of ION will also be able to obtain copies of the proxy statement/prospectus and other documents filed with the SEC that may be incorporated by reference therein, without charge, once available, at the SEC’s web site at www.sec.gov, or by directing a request to: ION Acquisition Corp 1 Ltd., 89 Medinat Hayehudim Street, Herzliya 4676672, Israel, Attention: Secretary, +972 (9) 970-3620.

Participants in the Solicitation

ION and its directors and executive officers may be deemed participants in the solicitation of proxies from ION’s shareholders with respect to the Business Combination. A list of the names of those directors and executive officers and a description of their interests in ION is contained in ION’s registration statement on Form S-1, which was filed with the SEC on October 1, 2020 and is available free of charge at the SEC’s website at www.sec.gov, or by directing a request to ION Acquisition Corp 1 Ltd., 89 Medinat Hayehudim Street, Herzliya 4676672, Israel, Attention: Secretary, +972 (9) 970-3620. Additional information regarding the interests of such participants will be contained in the Registration Statement when available.

Taboola and its directors and executive officers may also be deemed to be participants in the solicitation of proxies from the shareholders of ION in connection with the Business Combination. A list of the names of such directors and executive officers and information regarding their interests in the Business Combination will be contained in the Registration Statement when available.

Forward-Looking Statements

These communications include “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. ION’s and Taboola’s actual results may differ from their expectations, estimates and projections and consequently, you should not rely on these forward looking statements as predictions of future events. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believes,” “predicts,” “potential,” “continue,” and similar expressions are intended to identify such forward-looking statements. These forward-looking statements include, without limitation, ION’s and Taboola’s expectations with respect to future performance and anticipated financial impacts of the Business Combination, the satisfaction of the closing conditions to the Business Combination, and the timing of the completion of the Business Combination. These forward-looking statements involve significant risks and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside ION’s and Taboola’s control and are difficult to predict. Factors that may cause such differences include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to the termination of the merger agreement providing for the Business Combination or could otherwise cause the Business Combination to fail to close; (2) the outcome of legal proceedings that have or may be instituted against ION and Taboola; (3) the inability to complete the Business Combination, including due to failure to obtain the requisite approval of shareholders or other conditions to closing in the merger agreement providing for the Business Combination; (4) the receipt of an unsolicited offer from another party for an alternative business transaction that could interfere with the Business Combination; (5) the inability to obtain or maintain the listing of the ordinary shares of the post-acquisition company on The New York Stock Exchange following the Business Combination; (6) the risk that the announcement and consummation of the Business Combination disrupts current plans and operations; (7) the ability to recognize the anticipated benefits of the Business Combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably and retain its key employees; (8) costs related to the Business Combination; (9) changes in applicable laws or regulations; (10) the possibility that Taboola or the combined company may be adversely affected by other economic, business, competitive and/or factors such as the COVID-19 pandemic; and (11) other risks and uncertainties indicated from time to time in the proxy statement/prospectus relating to the Business Combination, including those under “Risk Factors” in the Registration Statement, and in ION’s other filings with the SEC. ION cautions that the foregoing list of factors is not exclusive. ION cautions readers not to place undue reliance upon any forward-looking statements, which speak only as of the date made. ION does not undertake or accept any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or any change in events, conditions or circumstances on which any such statement is based.

No Offer or Solicitation

These communications shall not constitute a solicitation of a proxy, consent or authorization with respect to any securities or in respect of the Business Combination. These communications shall also not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any states or jurisdictions in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of section 10 of the Securities Act of 1933, as amended, or an exemption therefrom.