I don’t have access to real-time information or events that have occurred after that date. However, I can provide you with some general trends and highlights in AI for search and ads up until that point. 

In recent years, Microsoft has been actively leveraging AI and machine learning in its search and advertising offerings. Here are some potential areas of focus:

1. AI-powered Search Relevance: Microsoft has been investing in improving the relevance of search results through the use of AI algorithms. This includes understanding user intent, context, and personalizing results.

2. Bing’s Intelligent Answers: Bing has been using AI to provide intelligent answers directly in search results, aiming to reduce the need for users to click through to a website for information.

3. Smart Bidding and Ad Campaign Optimization: In the advertising space, Microsoft Advertising (formerly Bing Ads) has been utilizing AI for smart bidding strategies. These strategies use machine learning to optimize bids for conversions, clicks, or other specified goals.

4. Audience Targeting: AI-powered audience targeting allows advertisers to reach specific demographics or user segments based on their behavior, interests, and characteristics.

5. Chatbots and Conversational AI: Microsoft has been active in developing conversational AI solutions, like their Azure Bot Service, which allows businesses to create intelligent, natural language interfaces for their applications.

6. Visual Search: This technology allows users to search for information using images. Microsoft’s AI capabilities have been employed to improve the accuracy and relevance of visual search results.

7. Voice Search and Assistance: With the rise of smart speakers and voice-activated devices, Microsoft has likely been working on improving the AI behind Cortana, their virtual assistant, to enhance voice search capabilities.

8. Ad Fraud Prevention: AI and machine learning can be used to detect and prevent ad fraud, which is a critical concern in the online advertising space.

Remember, the specifics of Microsoft’s latest developments in AI for search and ads For the most recent advancements, I recommend checking Microsoft’s official announcements, press releases, or reliable tech news sources.