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I'm getting issue with website meta info. If I will set the default meta info then it will display the same info tag for all the pages.

But when I'm trying to set the meta info for particular page then it will not display the Meta title & description.

I have set the Meta description & title for one category. In this case the Meta description & title tag showing for the same category page.

Solution I applied to display the both the tags for category pages:

I have created one observer & set the description for the current category. But when I tried to set the title then I got below error.

Recoverable Error: Object of class MagentoFrameworkViewPageTitle
could not be converted to string in
/var/www/html/htdocs/vendor/magento/framework/View/Page/Config/Renderer.php
on line 125

I used below code to set the meta title & description.

$this->_pageConfig->setMetadata('title', 'some meta title');

$this->_pageConfig->setDescription($desc);

$this->_pageConfig->setKeywords($keyWrds);

Thanks for any help.

Use this code to set Metatitle,

$this->_pageConfig->getTitle()->set(__('Your Title'));

Refer block and its method,

MagentoCatalogBlockCategoryView::_prepareLayout()

In this way you can set the meta title and Description,

$category = $this->getCurrentCategory();
if ($category) 
 $title = $category->getMetaTitle();
 if ($title) 
 $this->pageConfig->getTitle()->set($title);
 
 $description = $category->getMetaDescription();
 if ($description) 
 $this->pageConfig->setDescription($description);
 
 $keywords = $category->getMetaKeywords();
 if ($keywords) 
 $this->pageConfig->setKeywords($keywords);
 
 if ($this->_categoryHelper->canUseCanonicalTag()) 
 $this->pageConfig->addRemotePageAsset(
 $category->getUrl(),
 'canonical',
 ['attributes' => ['rel' => 'canonical']]
 );