It was another busy week for Australia's top brokers. This has led to the release of a number of broker notes.

Three broker buy ratings that you might want to know more about are summarised below. Here's why brokers think these ASX shares are in the buy zone:

Harvey Norman Holdings Ltd (ASX: HVN)

According to a note out of Bell Potter, its analysts have retained their buy rating on this retail giant's shares with an improved price target of $6.00. Bell Potter was pleased with the company's half year results from last month. In addition, it feels that Harvey Norman's shares are trading at attractive level at just ~15x estimated forward earnings. Particularly given that there are multiple potential catalysts on the horizon. This includes improving sales trends in key markets, assisted by a sizeable upside from the AI driven upgrade cycle/replacement and spend shift to tech, increased penetration in targeted regions in the UK, and the incremental earnings opportunities in its Property division. Bell Potter points out that the company is Australia's largest single owner of Large Format Retail with a whopping $4.4 billion global portfolio. The Harvey Norman share price ended the week at $5.10.

Life360 Inc (ASX: 360)

Another note out of Bell Potter reveals that its analysts have retained their buy rating on this location technology company's shares with an improved price target of $28.00. Bell Potter was impressed with the company's full year results at the end of last month. It notes that Life360 revealed revenue and EBITDA ahead of both its own and the market's expectations. This has led to Bell Potter upgrading its revenue forecasts in FY 2025 and FY 2026 by 3% and 4%. It has also upgraded its adjusted EBITDA estimates by 21% and 20% and now forecasts FY 2025 adjusted EBITDA of US$70 million. This is close to the middle of the guidance range provided by management. The Life360 share price was fetching $22.28 at the end of last week.

Qantas Airways Ltd (ASX: QAN)

Analysts at Goldman Sachs have retained their buy rating on this airline operator's shares with an increased price target of $11.80. According to the note, Goldman was very pleased with the company's half year results last month. In fact, the broker believes the results support its view that Qantas' earnings have been sustainably reset to a higher base. As a result, it feels this justifies the significant re-rating in its valuation over the past 12 months. In addition, the broker feels that the result provided early indications and greater clarity associated with fleet renewal benefits, which will be a key contributor to future growth and profitability. The Qantas share price ended the week at $9.91.