Web 2.0 is the present state of the web where users can interface with the online games, but are totally dependent on the developers and centralized servers that run the game. Web 2.5 is the next step in web evolution that is already in use, offers some decentralization mainly through NFTs and crypto wallets, and is getting the users ready to embrace the next step in the evolution, Web 3.0. Web 3.0 offers complete decentralization, improved security and freedom.

Source: EastMojo

Web 2.0

Web 2.0 is what is mostly used today, with websites and games that allow
users to interact with each other and the online content on it. Web 2.0 has its
limitations and downsides, and arguably the biggest one being centralization.
Centralization in this context means the power developers, or institutions have
over the particular video game or website. For example, you are a gamer that
plays Call of Duty or Fortnight, and you are able to trade within the game for
weapons, armor, pets etc. All this trade is typically done online with game-limited,
non crypto currency that is completely controlled by game developers or large
multimedia companies, and it runs on centralized servers. This poses a high
risk for gamers and they are essentially left dependent on the mercy of the
game developers. If game developers decide to change the game up, or implement
new upgrades, previous assets used within the game might become obsolete and
players hard work might be for nothing. The same goes for the dependency on
the centralized servers, which might go offline or fall victim to cyber-attacks
that can shut the game down, and all the hard work players put in again goes
down the drain irreversibly. For all these reasons, and for continuous web
development Web 2.5 was created as a bridge to the upcoming Web 3.0.

Web 2.5 – The Bridge 

Web 2.5 is, as the name suggests, an upgraded version of Web 2.0. The main
difference between the two is the decentralized control players have over their
in-game assets and their data. The biggest change is the introduction of NFTs
(Non-fungible Tokens), which gives users real control over their in-game assets
and the ability to trade them as they see fit, without outside control. Another
major change is the ability to trade in game-earned assets for Cryptocurrencies
and create real-world value. This was the catapult for play-to-earn concept,
that allows players to earn real money within the game. This led to the
integration of crypto wallets that allow users to store, trade, and track their
in-game earned tokens and cryptocurrencies. Why Web 2.5 is still only a bridge
between Web 2.0 and Web 3.0 is the fact that some centralization is still
actively present. Developers still control the in-game currency value, how
in-game assets work and their value, the effectiveness of the weapons, the
gamer community structure, and essentially the value of all in-game items.
Therefore the shift to Web 3.0 is essential, and it will bring all the benefits
that Web 2.5 and Web 2.0 are lacking.

Web 3.0 – The Future 

Web 3.0 is a decentralized future that we all have been waiting for. Compared to current Web 2.0 and Web 2.5, Web 3.0 promises to deliver full decentralization to its users, with more security, freedom, and stability. Instead of previously mentioned centralized servers
that host Web 2.0 and Web 2.5 (for the most part), Web 3,0 will host its games
on independent nodes, that run on a network of computers. Being structured in
this way, Web 3.0 is much harder to hack, because hacking cannot affect all the
network at once, but instead only parts of it, while other nodes keep the game
going regardless of the hacked part. This truly creates games that all always
online, and puts user security on a new level.

One of the things that are important to note is that Web 3.0 will be designed
for everyone, but not all people will be comfortable using it due to its
complexity. For someone familiar with cryptocurrency and blockchain
technology Web 3.0 will be a great asset and relatively easy to use. On the
other hand for those people who are not familiar with blockchain or the cryptocurrency
world, Web 3.0 can be confusing and they will need to learn the basics to start
with. I am referring to the use of crypto wallets, trading of cryptocurrencies,
using seed phrases, NFTs, and all the other elements that are part of this
world, which will require new users to learn it before they can actively
participate in Web 3.0.

On top of this, blockchain can consume a lot of computing power if it is
used extensively, and if too much data is stored on it. This might result in
scalability issues as well as number of transactions that can be processed per
minute.

Currently, we can see the pioneers of Web 3.0 such as Decentraland and
Sandbox paving the way, and showing how this development can be used and
implemented. In the end, the blockchain was born with the vision of the future,
and constant innovation and development are in its DNA. Web 3.0 is one of the
biggest milestones on this journey and we can sit back and see what is to come
shortly and how we can benefit from all of it.