There have been several recent developments in online advertising, some of which are:

1. Increased use of automation and machine learning: Advertisers are increasingly using automation and machine learning to optimize their ad campaigns. This includes using programmatic advertising platforms that automatically bid on ad inventory and adjust ad targeting based on data analysis.
2. Growth of social media advertising: Social media platforms such as Facebook, Instagram, and Twitter have become increasingly popular advertising channels. Advertisers can use these platforms to target specific audiences based on demographic, behavioral, and interest data.
3. Emergence of voice search advertising: As more consumers use voice search assistants such as Amazon Alexa, Google Home, and Apple Siri, advertisers are exploring new ways to reach users through voice-based ads and sponsored content.
4. Rise of influencer marketing: Influencer marketing has become a popular form of online advertising, particularly on social media platforms such as Instagram and YouTube. Advertisers partner with influencers who have large followings to promote their products or services.
5. Increased focus on data privacy: With growing concerns about data privacy, online advertisers are being held to higher standards. Regulations such as GDPR and CCPA have placed restrictions on the collection and use of personal data for advertising purposes, and advertisers are being required to be more transparent about their data practices.
6. Integration of Augmented Reality (AR) and Virtual Reality (VR) in advertising: AR and VR technology is being increasingly used to create immersive advertising experiences. Advertisers can create 3D virtual environments where users can explore and interact with products and services.
7. Increased emphasis on video advertising: Video advertising has become a highly effective way to engage consumers, and advertisers are increasing their use of video ads on platforms such as YouTube, Facebook, and Instagram. Additionally, the growth of live streaming platforms such as Twitch and TikTok has opened up new opportunities for video advertising.
8. Use of contextual advertising: With the growing concerns around data privacy, advertisers are exploring new ways to target consumers without using personal data. Contextual advertising involves targeting ads based on the content that a user is viewing, rather than their personal data. This can include targeting ads based on the keywords in a webpage, the topic of a blog post, or the genre of a video.
9. Expansion of mobile advertising: Mobile advertising continues to grow as more consumers use smartphones and tablets to access the internet. Advertisers are creating mobile-specific ads that are optimized for smaller screens and leveraging the unique features of mobile devices, such as push notifications and location-based targeting.
10. Increased use of ad-blockers: With more and more users installing ad-blockers, advertisers are exploring new ways to reach consumers. This includes creating native advertising that is seamlessly integrated into the content that users are viewing, or creating sponsored content that provides value to users in exchange for their attention.

Overall, online advertising continues to evolve and adapt to the changing digital landscape. Advertisers are continually exploring new technologies and strategies to reach and engage consumers in meaningful ways while respecting their privacy and preferences.