Hello all. I am going to review
https://steemworld.org/ in this article. It is an article created by @steemchiller. Please read carefully and don’t miss anything, thank you. :D

Please explain how to check Reward Summary for All time, last 30 days and last 7 days for your account?
Visit Steemworld.org and then Sign in to your account. After that Click on Dashboard as shown below image.

See reward summary below after clicking.

Please explain What is Delegations, type of Delegations and how to Delegate SP?
Delegation is the method to delegate/share our SP to another Steem Account or Community. And we can delegate our SP to another Steem Account through Steemworld.
Click on delegation(in black box).

3 TYPES OF DELEGATIONS

1. Incoming Delegation: Another steem Account has delegated their SP to our account.

2. Outgoing Delegation: We have delegated our SP to another steem Account.

3. Expiring Delegation: We have removed our ongoing delegation.

How to delegate SP?
Click on delegation and then click on Delegate.

And then, Enter the necessary details required in this field. Image below.

How to check Incoming and Outgoing Votes, please explain this with screenshots of both votes for your account?

To check incoming votes, Click on Stats and then Click on Incoming Votes. As shown in the image below.

To check outgoing votes, Click on Stats and then Click on Outgoing Votes. As shown in the image below.

How to check account operations for past 7 days and what all details can be checked?
To Check Account Operations, Click on Stats and then Scroll down and then Click on Account Operations. You will see the Account Operations of the past 7 days. As shown below.

We can check Comments, Votes, Delegations, and many other things through Account Operations. As shown below.

Please explain Author, Curation and Beneficiary Rewards. Also, mention author and curation rewards for your account for past 7 days.

REWARDS
Author Rewards: This is the reward a content creator/user on Steemit earns from the upvotes on the post and it is at least about 75% of the total reward.

Curation Rewards: This is the reward a user gets from commenting or replying to a post on Steemit, this reward is divided amount the curators and it is about 25% of the overall payout.

Beneficiary Rewards: A content creator can choose to give a certain percentage of the rewards from a post to another user or a community, the reward received by that user or community from the post or comment is known as the Beneficiary award.

• Author reward for my account**
  

Curation reward for my account

How to check your upvote value and at different voting weights
See images below.

After that, click on resource credits.

CONCLUSION
Thank You @Steemit for Making me Understand this better.