The gay community and those within it have been around since the beginning of the human race. From the Ancient Romans who were openly and proudly bisexual (that is, they were attracted to both binary genders, the only ones known to most at the time) to quite literally every culture that recorded their experiences in literature throughout history. Whether they were accepted for who they were at the time or forced to remain closeted for the entirety of their life, a portion of the population of any culture in the past or present have identified within the LGBTQ+ Community.
What does LGBTQ+ stand for?
LGBTQ+ (or LGBTTQQIAAP, when extended) stands for the various most commonly used labels within the Community. The labels featured in the initialised title include lesbian, gay, bisexual, transgender, transsexual, queer, questioning, intersex, asexual, ally and pansexual. There are, of course, many other labels that people identify with and these are no lesser respected among community members than those mentioned above. Essentially, anyone who is not allocishet (allosexual/romantic, cisgender, heterosexual/romantic) is generally considered a part of the community.
What is the LGBTQ+ Community progressive flag?
The flag includes the original gay, or homosexual, flag, whilst also including the trans flag on the left and the black and brown lines to acknowledge the difficulties of coloured members of the LGBTQ+ Community.

Thank you for this, L.J. It’s been very informative so far, and hopefully, it will spread more awareness and positivity about the LGBTQ+ community. Keep up the good work.