This is basically a listing of existing shares in an open market to enable the trading of these stocks. The company shares were already being held by several stockholders.
What is the difference of Listing by Introduction with Initial Public Offering?
The two terminologies are totally different as shown on the following table.
Other distinctions aside from the possibility of being a property dividend distribution:
1. The shares are already being listed and are being traded in another open market
2. The shares are being transferred from one open market to another
3. The shares are mandated by various laws to be listed in the open market
Are we going to trade on it?
The basic rule is that if this is not your game, avoid trading on it. This is prone to be just a hype trades.
If you are not familiar with the company, avoid trading.
If you trade on chart, avoid trading since there is no chart at all.
Here are the latest first day trades as of June 2020 at PSEi:
Initial Listing by Introduction of Altus Property Ventures, Inc. (APVI) on June 26 2020
Initial Public Offering of Merry Mart (MM) on June 18 2020

Recommendation
Again, if this is not your trading game, control your emotions and avoid trading since the huge institutions might just play on you.