By Jaspreet Singh Feb 5 (Reuters) - Reddit forecast first-quarter revenue above analysts' estimates on Thursday, as artificial intelligence-powered enhancements to its ad platform help the social media platform draw more marketers. Shares of the company rose around 2% in extended trading after it also announced its first share repurchase program of up to $1 billion, citing strong profitability and cash generation. Reddit allows ad placement directly within subreddit discussion threads, driving advertiser spending on the platform as brands aim to reach highly engaged and niche communities that discuss topics relevant to their products and services. Its ad platform uses AI to enhance campaign creation and management, with features including an AI copywriter that generates Reddit-specific ad copy and an image auto-crop tool for required aspect ratios on the platform. The first-quarter revenue is expected to be between $595 million and $605 million, above analysts' average estimate of $577.2 million, according to data compiled by LSEG. Its forecast of adjusted earnings before interest, taxes, depreciation and amortization of $210 million to $220 million was above estimates of $202.9 million. "Expectations were already high coming into the quarter, but the results still surprised by showing how tightly product momentum, advertiser demand, and user engagement are now reinforcing one another," said Emarketer senior director Jeremy Goldman. Reddit is ratcheting up competition with Meta by rolling out AI-powered Max campaigns in beta, which automate ad campaigns by adjusting bids to hit target cost-per-result as well as dynamically selecting headlines and creatives. Facebook-owner Meta and Snapchat-parent Snap also reported upbeat fourth-quarter revenue. Reddit's fourth-quarter revenue rose 70% to $726 million, beating estimates of $665.4 million. Its earnings per share of $1.24 also exceeded estimates of 94 cents. Daily active unique visitors rose 19%, to 121.4 million in the quarter ended December 31, while its global average revenue per user increased by 42%. (Reporting by Jaspreet Singh in Bengaluru; Editing by Vijay Kishore) (The article has been published through a syndicated feed. Except for the headline, the content has been published verbatim. Liability lies with original publisher.)