The members attach great importance to Christ's second coming. It was predicted to occur in 1914 but lack of evidence to it not having happened doesn't seem to have diminished their belief that it soon will.
After the second coming occurs there will be a final judgement and Armageddon in which all will be destroyed except for the Jehovah's Witnesses. They will be taken up to heaven but the Earth will remain the abode of humanity. The chosen will consist of 144,000 who will live with Christ in heaven.
Among other things the Witnesses abjure military service and because of their understanding of biblical beliefs that eating blood is forbidden they refuse blood transfusions and neither will they give them.
The Watch Tower Bible Tract and Watch Tower Student organisation form part of the organisation.
Understanding this contrast, may also help answer the question:
Jehovah's Witnesses are not associated with Christendom, which did not exist, prior to the 4th-century, and developed in Europe.
Jehovah's Witnesses are associated with Judaic Christianity, whose roots stretch back well before Christ, but was born with the appearance of Jesus and his disciples, and the early Christians, in the 1st and 2nd century.
The contemporary name 'Jehovah's Witnesses' was selected, after serious consideration, and examination of the scriptures.
Worship of man's "heavenly father", "Jehovah", had been discarded by 4th-century Christendom, in favor of worship of Jesus as God.
Contemporary Christians wishing to remain in agreement with Christ and the early Christians, returned to worshiping "Jehovah" as God, through a "mediator" (1 Timothy 2:5)- Jesus Christ; that is, Jesus' "righteousness" offset the "unrighteousness" of those who place their trust in Christ, which permits humans to personally approach God in prayer, and serve Him, within that framework.
This was what Christendom discarded, in the 3rd and 4th-century.
Not the ransom sacrifice of Christ, itself, but its purpose of permitting corrupted humans to gain access to Jehovah, and worship Him in a way that is acceptable to Him, until such time that they can stand before Him as clean, "righteous" individuals, themselves.
When this arrangement was discarded- in 4th-century Rome- Jesus became the'end', rather than the 'means' (for corrupted humans to approach God cleanly). And this distinguishes Jehovah's Witnesses, from the divisions of Christendom.
Returning to the popular superstition of removing God's identifying name from the Scriptures, made deleting God, easier to accomplish. And made it easier to worship Jesus as God; along with a few other alterations in the Hebrew- and then Greek- Scriptures.
The "Bible Students" (who existed from 1870 to 1931) served as the nuclei for Jehovah's Witnesses, and were not by definition in conflict with Christendom. But Jehovah's Witnesses, because of their own intrinsic definition- could no longer maintain any level of reconciliation with Christendom, who they did not actually spring from, as the "Bible Students" did.
Thus it was the detailed 'awareness' of that departure from Judaic Christianity, that set the stage for its reappearance and life, in the contemporary environment, today.
Jehovah's Witnesses did not return to an "Old Testament", but they opened it as the "Hebrew Scriptures", and fully apply its inspired, prophetic text, just as Jesus did. And they valued it as God's accurate word, along with the "Greek Scriptures"; no division between "old" and "new".
The Greek Scriptures are actually rich with quotes from the Hebrew Scriptures, both direct, and in the form of teachings.
So, acting as "witnesses" to the above-mentioned events, contemporary Judaic Christians- not to be confused with 'Jews'- selected the name 'Jehovah's Witnesses', because it best describes who they promote as God, and the activity they engage in, to accomplish that.
Consideration of Jesus' prayer, at John 17:20-26, along with many other texts, helped lead to this prayerful decision.
“I am the One who declared and saved and made known, when there was no foreign god among you. So you are my witnesses,” declares Jehovah, “and I am God."- Isaiah 43:12
So Jehovah's Witnesses have restored the divine text, to its original condition, which may, of course, appear alien to those unaccustomed to reading it, in the form that Jesus did; and his disciples did, with the publication of the Greek Scriptures, later on.
Jehovah's Witnesses do not accept the popular spiritistic concepts that were adopted by 4th-century Christendom, and used to reformulate Christian teaching, and declare tenants and creeds, since these were expressly adopted from Roman/Grekko/Egyptian/ Babylonian religions, and melded with the use of Greek philosophies.
The Trinity, the immortal soul, predestination, hellfire, emphasis on 'salvation' over responsibility, are some examples of these ancient, popular Gentile teachings. Jehovah's Witnesses do not subscribe to them.
Examples of scripture that inspired the contemporary selection of the name: "Jehovah's Witnesses":
"Sym′e·on has related thoroughly how God for the first time turned his attention to the nations to take out of them a people for his name."- Acts 15:14
"And in that day you will say: “Give thanks to Jehovah, call on his name, Make his deeds known among the peoples! Declare that his name is exalted."- Isaiah 12:4
"And many peoples will go and say: “Come, let us go up to the mountain of Jehovah, to the house of the God of Jacob. He will instruct us about his ways, and we will walk in his paths.”- Isaiah 2:3
“You are my witnesses,” declares Jehovah, “Yes, my servant whom I have chosen. ...before me no God was formed, And after me there has been none."- Isaiah 43:10
"Happy is the nation whose God is Jehovah, The people he has chosen as his own possession."- Psalm 33:12
Christianity and Christendom are often confused with one another, but note these simple contrasts (then and now):
Christianity: Non-political, Non-commercial
Christendom: Highly-political, Highly-commercial.
Other examples: Then and now:
Christianity: >Distributes the "good news" (mt.24:14, Acts 5:42) for open consideration. >Are not- and never were- "mainstream". > Worship Jehovah as God, recognizing Christ Jesus as a "mediator" (1 Timothy 2:5) between man and God.
Christendom: >Labors to 'Christianize' nations and their political and social systems. >Is "mainstream". >Worships Jesus as God.
There is a great more to say, to answer the question: 'Who or What Are The Jehovah's Witnesses?
But clarifying the contrast between them and who they might be confused with, is a start. And understanding why their selected name turns attention to God, and not themselves, helps one to focus on Jehovah, rather than His witnesses.
"Righteous Father, the world has, indeed, not come to know you, but I know you...and...I have made your name known to them and will make it known"- (Jesus' words) John 17: 25-26
“For I am Jehovah; I do not change."- Malachi 3:6
I love being a Jehovah's witness even tho at times it can be difficult, but I manage.
The followers known as Jehovah's witnesses normally reject the traditional Christian doctrines such as the trinity. They also don't believe in the eternal torment in hell and also in the immortality of souls. The teachings are also published in the Jehovah's official magazines; these magazines are namely: - The Watchtower and Awake.
One of the most important teachings of Jehovah's witnesses is that they don't believe in blood transfusion.