Optimism L2 is an effective Ethereum scaling solution that allows users to run Ethereum transactions at a significantly lower cost. Optimism uses a special mechanism that merges multiple transactions into a single transaction to utilize optimistic roll-ups. And later push that transaction to another blockchain for further processing and then issues the receipts of the transaction back to Ethereum. Learn more about Optimism from here.

For the first time in the history of web2 social media, Telegram introduced the ability to buy and sell short and recognizable @usernames for personal accounts, and public groups/channels. With this new feature, Telegram users now have full ownership of their usernames. Long-time and early Telegram users who have been using short usernames can now benefit from the platform's growth by selling their usernames in fair auctions.

The Arbitrum network is a layer-2 network, developed by the Offchain Labs based on New York. It is a technology known as “transaction rollups” which allows smart contacts to run on a separate layer while the platform leverages the security provided by the Ethereum mainnet. Learn more about Arbitrum from here.