AOL CEO Tim Armstrong just announced internally that there will be layoffs across AOL’s global workforce (AOL is TechCrunch’s parent company). The company will focus on mobile, video and data across two business units — media and platforms.

While the company doesn’t say exactly how many people will be affected by these layoffs, it is going to impact different teams across the global workforce. According to Recode, 500 employees are expected to lose their jobs. There are around 6,800 employees working for AOL in total, so today’s layoffs represent around 7 percent of the company. According to a source familiar with the matter, at least 55 job cuts affect the advertising technology division (Platforms) but most of the cuts are going to affect non-Platforms employees (e.g. Product, Media, Central Tech…).

This is a move to streamline the company’s workforce after a period of external growth. Over the last 12 months, AOL acquired Millennial Media and took over most of Microsoft’s advertising business. With those deals, AOL added more than 1,500 employees.

Back in July, AOL’s parent company Verizon announced that it would acquire Yahoo for $4.83 billion. If the deal goes through, the telecom company wants to combine Yahoo and AOL together.

So AOL wants to reduce its workforce ahead of the merger with Yahoo, but there could be more layoffs when Yahoo joins Verizon. The acquisition of Yahoo hasn’t closed yet. Yahoo confirmed in September that it had suffered a data breach affecting at least 500 million users. The data breach had a “material impact” on the acquisition discussions.

In an internal memo, Armstrong clarifies AOL’s business units. The Huffington Post, Engadget, TechCrunch, search and communications services are now part of the media unit, while advertising technology services are part of the AOL Platforms unit.

Armstrong sent the following memo to AOL employees called “Structuring AOL for 2017” (emphasis was in the original memo):