Hi Div,

Please refer the below code snippet. Hope it helps you.

// VF Page

<apex:page controller="NewAccountDiscription">
    <apex:form id="theForm">
        <apex:pageBlock id="thePBlock">
            <apex:pageBlockSection id="accountRecordSection">
                <apex:repeat value="{!AccountList}" var="acc">
                    <apex:inputtextarea style="resize:none" id="thetextArea" value="{!acc.Description}"/>
                </apex:repeat>
            </apex:pageBlockSection>
            <apex:pageBlockButtons location="bottom">
                <apex:commandButton value="Save" action="{!onSave}" />
            </apex:pageBlockButtons>
        </apex:pageBlock>
    </apex:form>
</apex:page>

// APEX Controller

public class NewAccountDiscription {
    public List<Account> AccountList{get;set;}
    public Boolean setEdit{get;set;}
    
    public NewAccountDiscription()
    {
        AccountList = new List<Account>();
        AccountList = [SELECT Name,Description FROM Account LIMIT 1];
        system.debug('AccountList-->'+AccountList);
    }
    public PageReference onSave()
    {
        List<Account> updateAccountList = new List<Account>();
        for(Account accloop: AccountList)
        {
            Account accountObject = new Account();
            accountObject.Id = accloop.Id;
            accountObject.Description = accloop.Description;
            updateAccountList.add(accloop);
        }
        update updateAccountList;
        
        PageReference pageRef = new PageReference('/apex/NewTestpageVF'); //Here in place of "NewTestpageVF" you need to pass your VF page name.
        pageRef.setRedirect(true);
        return pageRef;
    }
}

Please select as best answer if it helps you.

Thank You,
Ajay Dubedi