"Out-of-market" refers to games that are typically only available outside of your local TV market and are not televised in your local market via your local networks, regional sports networks or national networks. NBA League Pass and NBA Team Pass give you access to out-of-market games only, and do not grant access to any games that are typically televised in your local viewing area.
For example, if you live in Denver, Colorado, NBA League Pass or NBA Team Pass will NOT grant you access to Denver Nuggets games because they are in your local broadcast region. However, if you live in Portland, Oregon, and want to watch the Nuggets, NBA League Pass or NBA Team Pass will grant you access to all Denver Nuggets games that aren't subject to local blackout.
Blackout restrictions include your local NBA team(s) and all nationally televised games. So as a Nuggets fan living in Portland, NBA League Pass or NBA Team Pass will allow you to watch all Nuggets games EXCEPT games that are nationally televised (e.g. games that air on networks like NBA TV, ESPN, TNT, and ABC) and games where the Denver Nuggets play your local team, the Portland Trailblazers.
If you are looking to gain access to your local team's games, NBA League Pass or NBA Team Pass will not be the best option for you.