Exchange-traded funds (ETFs) are a great way to build a diversified portfolio with minimal effort.

Whether you're just starting your investment journey or looking to add some high-quality exposure to your portfolio, ASX ETFs provide a cost-effective and convenient way to invest in a broad range of assets.

If you have $3,000 to invest this month, here are three excellent ASX-listed ETFs that could be worth considering.

Betashares Global Cybersecurity ETF (ASX: HACK)

Cybersecurity is a megatrend that is only growing in importance. As businesses and governments continue to digitise their operations, the threat of cybercrime has become a multi-trillion-dollar problem. In fact, Betashares notes that global cybercrime is projected to cost the global economy over US$10 trillion annually this year, creating strong demand for cybersecurity solutions.

The Betashares Global Cybersecurity ETF offers investors exposure to some of the world's leading cybersecurity companies. The ETF includes major players such as Palo Alto Networks, CrowdStrike, and Fortinet, which provide cutting-edge security solutions to combat cyber threats.

With the increasing reliance on digital infrastructure and the rising cost of cyberattacks, the Betashares Global Cybersecurity ETF could be a great long term pick for investors.

Betashares Australian Quality ETF (ASX: AQLT)

If you're looking for high-quality Australian companies, then the Betashares Australian Quality ETF could be just the ticket. This ASX ETF follows a rules-based strategy to select companies based on strong fundamentals, which ensures that investors gain exposure to businesses with solid financial health and competitive advantages.

Betashares Australian Quality ETF holds a mix of blue chip stocks with strong balance sheets, stable earnings, and consistent profitability. Some of its key holdings include Telstra Group Ltd (ASX: TLS), Wesfarmers Ltd (ASX: WES), Westpac Banking Corp (ASX: WBC), and Pro Medicus Limited (ASX: PME), all of which have a proven track record of delivering value to shareholders.

Legendary investor Warren Buffett has long emphasised investing in high-quality businesses with durable competitive advantages, and this fund aligns well with this philosophy. If you want a long-term, core holding in your portfolio, this ETF could be a solid choice. Betashares recently tipped it as one to buy.

Betashares Australian Momentum ETF (ASX: MTUM)

Momentum investing is a strategy that involves buying stocks that have demonstrated strong price performance and selling those that have underperformed. While this approach can be difficult for individual investors to execute effectively, the Betashares Australian Momentum ETF makes it easy.

This fund provides exposure to a professionally managed portfolio of ASX stocks that are experiencing strong upward price trends. It is systematically rebalanced to capture emerging winners while removing underperforming stocks. This strategy removes the emotional biases that often lead investors to buy high and sell low.

By investing in the Betashares Australian Momentum ETF, you gain access to a proven trend-following strategy that has historically delivered strong returns. No wonder Betashares recently named it as one to buy.