We are subject to numerous domestic and foreign laws and regulations that involve matters central to our business, including laws regarding privacy, data protection, data security, user-generated content and consumer protection, among others, as described in more detail under "Business—Government Regulation" under Item 1 of this Annual Report. For example, we are subject to numerous laws around the world that restrict the collection, use, storing, processing and disclosure of personal information and other user data. We are also subject to a variety of laws, regulations and guidelines that regulate the way we distinguish paid search results and other types of advertising from unpaid search results. We operate in a rapidly evolving industry, and many laws and regulations that impact our business are being proposed, are still evolving or are being tested in courts, which adds to the complexity of operating our business. Our business could be adversely affected if we are required to change our current policies, practices or the design of our platform, products or features based on new laws, regulations or judicial interpretations. For example, there have been ongoing Congressional efforts to restrict the scope of the critical liability protections afforded to online platforms like ours under CDA 230, which could increase our content moderation costs and our exposure to liability in connection with the publication of third-party content, including user-generated reviews. Changes to CDA 230 could also cause us to remove more third-party content from our platform, particularly critical consumer commentary, in response to takedown demands that may or may not be legitimate, which would negatively affect the quality and quantity of information available through our service. Similarly, regulatory frameworks for privacy issues and behavioral advertising are currently in flux worldwide and are trending toward more restrictive obligations, reflecting increased public scrutiny of the practices of companies offering online services with respect to the personal information and behavior of their users. Changes to privacy and data security laws in particular could make it more difficult for consumers to use our platform, resulting in lower traffic and revenue, or make it more difficult for us to provide effective advertising tools to businesses on our platform, resulting in fewer advertisers and lower revenue. For example, in addition to giving residents expansive rights related to their personal information, California law restricts the “sale” of personal information and the use of cookies and similar technologies for certain advertising purposes. If these and other future restrictions negatively impact our ability to offer ad products that are highly targeted to audience interests, or to measure the effectiveness of our ad products, such as our ability to offer store-level attribution through integrations with third-party data partners, our ability to maintain and expand our base of advertisers will be harmed. These challenges may be compounded to the extent that different jurisdictions adopt inconsistent or conflicting laws and regulations applicable to our business, which would add complexity to our operations and increase our compliance costs. For example, laws in all states and U.S. territories require businesses to notify affected individuals and governmental entities of the occurrence of certain security breaches affecting personal information. However, these laws are not consistent, and compliance with them in the event of a widespread data breach would be complex and costly. It is also possible that the interpretation and application of various laws and regulations may conflict with other rules or our practices, such as industry standards to which we adhere, our privacy policies and our privacy-related obligations to third parties (including, in certain instances, voluntary third-party certification bodies). Uncertainty regarding the application and interpretation of existing laws and regulations due to court challenges or evolving legislation may also result in a significantly greater compliance burden for us. For example, a decision by the European Court of Justice of the European Union called into question one of the primary safeguards allowing transfers of personal information from Europe to the United States and most other countries under the U.S.-E.U. Privacy Shield Framework. The E.U. and the United States continue to negotiate a new set of safeguards that may impose additional obligations and requirements with respect to the transfer of E.U. personal data to other jurisdictions, which in turn may increase the legal risks and liabilities under the GDPR and local E.U. laws associated with cross-border data transfers, as well as result in material increases in our compliance and operational costs. If we are unable to implement a valid solution for personal information transfers from Europe, we will face increased exposure to regulatory actions, substantial fines, and injunctions against processing or transferring personal information from Europe and may be required to increase our data processing capabilities in Europe at significant expense. Similarly, in November 2020 California voters approved a ballot measure to enact the CPRA, which will come into effect in 2023 and significantly modifies the privacy obligations under the CCPA, creating uncertainty and requiring us to incur additional costs and expenses. Other states and countries have passed their own privacy legislation (for example, Virginia and Canada) or have such legislation pending. Aspects of the CCPA, CPRA and other laws remain unclear and we may be required to modify our practices further in an effort to comply with them. In addition to various laws and regulations, we must comply with the technical requirements and policies of the search engines, application marketplace operators, mobile operating systems and other third-party products and services on which we rely. For example, Apple recently made certain changes to its products and data use policies in connection with changes to its iOS operating system that reduce our ability to target and measure advertising. If we do not comply with these requirements, we could lose access to such products and services, which would harm our business. Our actual or perceived failure to comply with laws, regulations and other obligations could lead to costly legal action, adverse publicity, significant liability and decreased demand for our services, which could adversely affect our business, results of operations and financial condition. For example, our failure or perceived failure to comply with applicable laws and regulations may result, and in some cases has resulted, in inquiries and other proceedings and actions against us by governments, regulations or others. Responding to and resolving any future litigation, investigations, settlements or other regulatory actions may require significant time and resources, and could diminish confidence in, and the use of, our products. We may also be forced to implement new measures to reduce our legal exposure, which may require us to expend substantial resources, delay development of new products or discontinue certain products or features, which would negatively impact our business. For example, if we fail to comply with our privacy-related obligations to users or third parties, or any compromise of security that results in the unauthorized release or transfer of personal information or other user data, we may be compelled to provide additional disclosures to our users, obtain additional consents from our users before collecting or using their information or implement new safeguards to help our users manage our use of their information, among other changes. Any resulting negative publicity could adversely affect our reputation and brand, regardless of whether the internal resources expended and expenses incurred in connection with such inquiries and their resolutions are material.