Deadly Boss Mods (DBM) WOW Addon 1.13.0/8.3.0/8.2.0 is about what is happening to you, and what you have to do about it. For a classic, the ultimate encounter helper, it gives you fight information, it is easier for you to process at a glance.

Features
It has mods for raid, dungeon, and for brawlers guild
It shows you colored raid warnings with icons and to the point messaging. You are able to know what to do, it does not show you a spell name.
It is focused on filtering/hiding what you don’t need to know for your role, or it is what you can’t do, such as you do dispel/interrupt on cooldown. It helps you to focus on the information you do need, in order to disable these filters for people who need a bigger overview of fight events.
There is auto-respond during boss fights. It includes the name and health of the boss as well as the raid’s status. It is optional, and it is disabled
Bars maybe is enlarged, it also has custom effects
Bars do not only show time remaining but also make use of colors and icons. You can also know what type of ability is coming, and what the role for it. You can process these bars at a glance.
Deadly Boss Mods (DBM) WOW Addon requests the timer and combat status information from other DBM
This add-on is used to show fight overviews or specific mechanics when you want information at a quick glance
Modular design: there are all boss mods which plugin, and are removed, exchanged, or updated separately

Load on demand: there are all boss mods which don’t use memory or CPU unless you have the corresponding instance
There are some special effects like the screen flash effect, huge warning messages, and sounds, that make them effective to your needs.
From external sources, it is easy for you to use any texture for your bars, and you can also choose sounds
It is the best for PTR/Beta encounter testing. Only this add-on provides cutting edge auto-learning timers right in the middle of your testing. So you know what’s coming and when it happens
Based on warning, every mod puts careful thought into what the best voice for an alert. It is clear, and concisely advice action
It has good callbacks when you can use for the best possible Weak Auras integration
Additional Mods
Classic & retail: it has event sound pack
Retail only: spell timers, DBM-archaeology, and DBM-challenges
Countdown Packs
Classic & retail: it does not only has count pack overwatch but also has the count pack HOTS
Voice Packs
English TTS female: it has voice pack VEM
You can search for more things
Conclusion
Deadly Boss Mods (DBM) WOW Addon 1.13.0/8.3.0/8.2.0 does not only focus on what is happening to you but also focus on what you have to do about it.