Let’s look at important things here –

Moon - Moon represents Mind, Emotions, Mother, Local Government, Peace of Mind, Home Environment, Water, Milk etc.

Purva Bhadrapada Nakshatra - It is a nakshatra related with mystical events and experiences. It is also nakshatra of duality. Please check this link for more info on Purva Bhadrapada Nakshatra - https://www.astrosaxena.com/pbnaksha. 

Aquarius - As Purva Bhadrapada is part of Aquarius sign, Aquarius and things represented by Aquarius are also important here. Aquarius is 11th sign of zodiac belt, hence it signifies the things and energy related with 11th house of horoscope, such as Gains, Desires, Hopes and Wishes, Large Organisations, Network Circles etc. Besides this, Aquarius also represents Scientific Thinking & Research, Uplifting the Society, Higher Goals & Rewards for all. Aquarius is made of another set of 2 and half Nakshatra, i.e. Dhanishtha, Satabhisha and Purva-Bhadrapada. Aquarius Lord is Saturn & Rahu. 

Pisces - As Purva Bhadrapada is also a part of Pisces sign, Pisces and things represented by Pisces are also important here. As Pisces is the 12th sign of zodiac belt, it represents the same energy and things which are represented by 12th house such as Isolated Places, Spirituality, Imagination, Other Dimension or Other World etc. Besides these things, it also represents your Hidden Talents, Ability to work in background, Spiritual Self etc. Pisces is consisted of last 2 and half nakshatra, i.e. Purva-Bhadrapada, Uttara-Bhadrapada & Revati. Pisces' lord is Jupiter.

Saturn & Rahu - As Saturn-Rahu co-rule Aquarius, their position and dignity is important to know about the overall functioning of any planet in  Purva Bhadrapada/Aquarius. 

Jupiter - As Jupiter rules Purva Bhadrapada and Pisces, its position and dignity is important to know about the overall functioning of any planet in  Purva Bhadrapada/Pisces. 

Houses Involved – Also, we can’t afford to forget the houses involved as a planet can be ruling different houses and sitting in different house for every person as per ascendant and planet’s position. To know overall affect, we have to consider the houses involved as those areas of life are being impacted.

Interpretation of Moon in Purva Bhadrapada Nakshatra – Now, Moon coming in Purva Bhadrapada Nakshatra shows someone whose mind has got some initial inclination towards spiritual pursuits. This person may just start with his interest in following a spiritual Guru or some spiritual pursuits like Meditation. The best example can be a person who has just got initiation in Sannyas. He should realize that his journey has just began on that day. Taking Sannyas doesn't mean that you are enlightened. So, Moon in this nakshatra shows a person who has just started the journey in spiritual world. They will be inclined towards gaining spiritual knowledge, collecting information etc. They will also be interested in occult and mystical side of life. In Aquarius portion, they will utilize this knowledge in serving humanity or some higher cause. In Pisces sign, they may use it for own and others' spiritual development. This is the highest or purest way to use this nakshatra's energy. As Purva Bhadrapada is represented by double-faced person, they can be easily frauds or cheats. Even in spiritual field, they can be like a Fake Guru. So, it depends on soul's evolution as to where it uses the same energy. They can be teachers, counselors or guides. As always, these traits can come through their Mother. 

Its nice that we talked about the initial stage of spirituality on Buddha Purnima day.

Role of Saturn & Rahu - Also, Saturn-Rahu placement is important to guide Moon in right direction, being Aquarius lords.

Role of Jupiter - Likewise, Jupiter placement is important to guide Moon in right direction, being Pisces and Purva-Bhadra lord. 

Other Factors – And of course, we need to consider conjunction, aspects, house lordship, house position and dashas etc to know the exact results of Moon in Purva Bhadrapada. So, we always need to take a holistic view of chart rather than just 1 planetary position.

Conclusion – So, this is how I see Moon in Purva Bhadrapada can work in a chart.